mb/amd,google: unify fch_irq_routing struct instance name

Use the same fch_irq_map name in all mainboards using the Picasso,
Cezanne, Mendocino and Morgana instead of using a mainboard-specific
name.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I035cffb9c6c8afd6bd115831e8eed4a395e2a7fc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68846
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
diff --git a/src/mainboard/google/guybrush/mainboard.c b/src/mainboard/google/guybrush/mainboard.c
index d3a45c1..150835c 100644
--- a/src/mainboard/google/guybrush/mainboard.c
+++ b/src/mainboard/google/guybrush/mainboard.c
@@ -44,7 +44,7 @@
  *  8: rtc0 <- soc/amd/common/acpi/lpc.asl
  *  9: acpi <- soc/amd/common/acpi/lpc.asl
  */
-static const struct fch_irq_routing guybrush_fch[] = {
+static const struct fch_irq_routing fch_irq_map[] = {
 	{ PIRQ_A,	12,		PIRQ_NC },
 	{ PIRQ_B,	14,		PIRQ_NC },
 	{ PIRQ_C,	15,		PIRQ_NC },
@@ -82,8 +82,8 @@
 	memset(fch_pic_routing, PIRQ_NC, sizeof(fch_pic_routing));
 	memset(fch_apic_routing, PIRQ_NC, sizeof(fch_apic_routing));
 
-	for (i = 0; i < ARRAY_SIZE(guybrush_fch); i++) {
-		entry = guybrush_fch + i;
+	for (i = 0; i < ARRAY_SIZE(fch_irq_map); i++) {
+		entry = fch_irq_map + i;
 		fch_pic_routing[entry->intr_index] = entry->pic_irq_num;
 		fch_apic_routing[entry->intr_index] = entry->apic_irq_num;
 	}