ec/google: Use EC_HOST_EVENT_NONE

google_chromeec_get_event returns 0 for no event. Return
EC_HOST_EVENT_NONE=0 to improve readability.

BUG=b:184074997
TEST=Build and boot guybrush without error

Signed-off-by: Rob Barnes <robbarnes@google.com>
Change-Id: Ic08ed9ccdd7c0023d0fe8b641fcf60dca495a242
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/auron/ec.c b/src/mainboard/google/auron/ec.c
index 5be20c0..d4482b0 100644
--- a/src/mainboard/google/auron/ec.c
+++ b/src/mainboard/google/auron/ec.c
@@ -23,7 +23,7 @@
 	google_chromeec_events_init(&info, s3_wakeup);
 	if (s3_wakeup) {
 		/* Clear pending events. */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 	}
 
diff --git a/src/mainboard/google/auron/smihandler.c b/src/mainboard/google/auron/smihandler.c
index 34ed171..6fa95e8 100644
--- a/src/mainboard/google/auron/smihandler.c
+++ b/src/mainboard/google/auron/smihandler.c
@@ -97,7 +97,7 @@
 	google_chromeec_set_sci_mask(0);
 
 	/* Clear pending events that may trigger immediate wake */
-	while (google_chromeec_get_event() != 0)
+	while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 		;
 }
 
@@ -107,14 +107,14 @@
 	case APM_CNT_ACPI_ENABLE:
 		google_chromeec_set_smi_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 		google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 		break;
 	case APM_CNT_ACPI_DISABLE:
 		google_chromeec_set_sci_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 		google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 		break;
diff --git a/src/mainboard/google/cyan/smihandler.c b/src/mainboard/google/cyan/smihandler.c
index d9121e1..9083a87 100644
--- a/src/mainboard/google/cyan/smihandler.c
+++ b/src/mainboard/google/cyan/smihandler.c
@@ -126,7 +126,7 @@
 	google_chromeec_set_sci_mask(0);
 
 	/* Clear pending events that may trigger immediate wake */
-	while (google_chromeec_get_event() != 0)
+	while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 		;
 
 	/* Set LPC lines to low power in S3/S5. */
@@ -141,14 +141,14 @@
 	case APM_CNT_ACPI_ENABLE:
 		google_chromeec_set_smi_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 		google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 		break;
 	case APM_CNT_ACPI_DISABLE:
 		google_chromeec_set_sci_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 		google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 		break;
diff --git a/src/mainboard/google/link/smihandler.c b/src/mainboard/google/link/smihandler.c
index 719076b..2f42b7d 100644
--- a/src/mainboard/google/link/smihandler.c
+++ b/src/mainboard/google/link/smihandler.c
@@ -69,7 +69,8 @@
 	google_chromeec_set_sci_mask(0);
 
 	/* Clear pending events that may trigger immediate wake */
-	while (google_chromeec_get_event() != 0);
+	while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+		;
 
 	/* Enable wake events */
 	google_chromeec_set_wake_mask(LINK_EC_S3_WAKE_EVENTS);
@@ -81,13 +82,15 @@
 	case APM_CNT_ACPI_ENABLE:
 		google_chromeec_set_smi_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_sci_mask(LINK_EC_SCI_EVENTS);
 		break;
 	case APM_CNT_ACPI_DISABLE:
 		google_chromeec_set_sci_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_smi_mask(LINK_EC_SMI_EVENTS);
 		break;
 	}
diff --git a/src/mainboard/google/rambi/smihandler.c b/src/mainboard/google/rambi/smihandler.c
index c16a0f5..358a92f 100644
--- a/src/mainboard/google/rambi/smihandler.c
+++ b/src/mainboard/google/rambi/smihandler.c
@@ -84,7 +84,8 @@
 	google_chromeec_set_sci_mask(0);
 
 	/* Clear pending events that may trigger immediate wake */
-	while (google_chromeec_get_event() != 0);
+	while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+		;
 }
 
 int mainboard_smi_apmc(uint8_t apmc)
@@ -93,13 +94,15 @@
 	case APM_CNT_ACPI_ENABLE:
 		google_chromeec_set_smi_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 		break;
 	case APM_CNT_ACPI_DISABLE:
 		google_chromeec_set_sci_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 		break;
 	}
diff --git a/src/mainboard/google/slippy/ec.c b/src/mainboard/google/slippy/ec.c
index 5761a7c..a3ee95b 100644
--- a/src/mainboard/google/slippy/ec.c
+++ b/src/mainboard/google/slippy/ec.c
@@ -22,7 +22,7 @@
 	google_chromeec_events_init(&info, s3_wakeup);
 	if (s3_wakeup) {
 		/* Clear pending events. */
-		while (google_chromeec_get_event() != 0)
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 			;
 	}
 
diff --git a/src/mainboard/google/slippy/smihandler.c b/src/mainboard/google/slippy/smihandler.c
index 81fcb0a..16a1b18 100644
--- a/src/mainboard/google/slippy/smihandler.c
+++ b/src/mainboard/google/slippy/smihandler.c
@@ -100,7 +100,8 @@
 	google_chromeec_set_sci_mask(0);
 
 	/* Clear pending events that may trigger immediate wake */
-	while (google_chromeec_get_event() != 0);
+	while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+		;
 }
 
 int mainboard_smi_apmc(u8 apmc)
@@ -109,13 +110,15 @@
 	case APM_CNT_ACPI_ENABLE:
 		google_chromeec_set_smi_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 		break;
 	case APM_CNT_ACPI_DISABLE:
 		google_chromeec_set_sci_mask(0);
 		/* Clear all pending events */
-		while (google_chromeec_get_event() != 0);
+		while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
+			;
 		google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 		break;
 	}