mb/google/brya: Enable EC

Perform EC initialization in bootblock and ramstages. Add associated
ACPI configuration.

BUG=b:174266035
TEST=Build Test

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: Ie1305706134ca7cc58b8a9941231d1ee14f80949
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48114
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/brya/mainboard.c b/src/mainboard/google/brya/mainboard.c
index fd0d5b6..99a060d 100644
--- a/src/mainboard/google/brya/mainboard.c
+++ b/src/mainboard/google/brya/mainboard.c
@@ -3,6 +3,7 @@
 #include <acpi/acpi.h>
 #include <baseboard/variants.h>
 #include <device/device.h>
+#include <ec/ec.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
 static void mainboard_init(void *chip_info)
@@ -13,8 +14,14 @@
 	gpio_configure_pads(pads, num);
 }
 
+static void mainboard_dev_init(struct device *dev)
+{
+	mainboard_ec_init();
+}
+
 static void mainboard_enable(struct device *dev)
 {
+	dev->ops->init = mainboard_dev_init;
 	dev->ops->acpi_inject_dsdt = chromeos_dsdt_generator;
 }