soc/amd/cezanne: Add FCH IO-APIC to MADT

TEST=Boot majolica to linux and see IO-APIC logs
ACPI: Local APIC address 0xfee00000
ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
IOAPIC[0]: apic_id 16, version 33, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
ACPI: IRQ0 used by override.
ACPI: IRQ9 used by override.
Using ACPI (MADT) for SMP configuration information

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ib8094c3edf401659d9d740e2cc6266ddd5f91da9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50803
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/soc/amd/cezanne/acpi.c b/src/soc/amd/cezanne/acpi.c
index ae86d12..ee76ed3 100644
--- a/src/soc/amd/cezanne/acpi.c
+++ b/src/soc/amd/cezanne/acpi.c
@@ -5,6 +5,8 @@
 #include <acpi/acpi.h>
 #include <amdblocks/acpi.h>
 #include <amdblocks/acpimmio.h>
+#include <amdblocks/ioapic.h>
+#include <arch/ioapic.h>
 #include <arch/smp/mpspec.h>
 #include <console/console.h>
 #include <cpu/x86/smm.h>
@@ -18,7 +20,10 @@
 	/* create all subtables for processors */
 	current = acpi_create_madt_lapics(current);
 
-	/* TODO: Add IOAPIC and GNB-IOAPIC */
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *)current,
+		FCH_IOAPIC_ID, IO_APIC_ADDR, 0);
+
+	/* TODO: Add GNB-IOAPIC */
 
 	current += acpi_create_madt_irqoverride(
 		(acpi_madt_irqoverride_t *)current,