mb/google/skyrim: Fix eSPI configuration

* Use GPE 24 since it doesn't conflict with any existing GEVENTS.
* Remove IRQ 12 mapping since it's not used.
* Unmask IRQ1 in PM registers.
* Use the new SMITYPE_ESPI_SCI_B SCI.

BUG=b:227282870
TEST=Build and boot to OS in Skyrim.

Signed-off-by: Jon Murphy <jpmurphy@google.com>
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I7e9816d67500365ed1d2ee39ef184a1f60321ca1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63704
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
diff --git a/src/mainboard/google/skyrim/ec.c b/src/mainboard/google/skyrim/ec.c
index bc29833..05994eb 100644
--- a/src/mainboard/google/skyrim/ec.c
+++ b/src/mainboard/google/skyrim/ec.c
@@ -10,8 +10,8 @@
 
 static const struct sci_source espi_sci_sources[] = {
 	{
-		.scimap = SMITYPE_ESPI_SYS,
-		.gpe = GEVENT_3,
+		.scimap = SMITYPE_ESPI_SCI_B,
+		.gpe = EC_SCI_GPI,
 		.direction = SMI_SCI_LVL_HIGH, /* enum smi_sci_lvl */
 		.level = SMI_SCI_EDG, /* enum smi_sci_dir */
 	}