soc/intel/alderlake: Hook up the OC watchdog

Hook up the OC watchdog common block and initialize it if requested.

TEST=Enable watchdog on MSI PRO Z690-A and see the platform resets
after some time. Enable the watchdog in driverless mode and see the
platform no longer resets and periodic SMI keeps feeding the watchdog.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: I1c2c640d48b7e03ad8cd8d6cdf6aac447e93cd86
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68945
Reviewed-by: Krystian Hebel <krystian.hebel@3mdeb.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/alderlake/Kconfig

@@ -65,6 +65,7 @@ config SOC_INTEL_ALDERLAKE
 	select SOC_INTEL_COMMON_BLOCK_IRQ
 	select SOC_INTEL_COMMON_BLOCK_ME_SPEC_16
 	select SOC_INTEL_COMMON_BLOCK_MEMINIT
+	select SOC_INTEL_COMMON_BLOCK_OC_WDT
 	select SOC_INTEL_COMMON_BLOCK_PCIE_RTD3
 	select SOC_INTEL_COMMON_BLOCK_PMC_EPOC
 	select SOC_INTEL_COMMON_BLOCK_POWER_LIMIT

src/soc/intel/alderlake/romstage/romstage.c

@@ -9,6 +9,7 @@
 #include <intelblocks/cfg.h>
 #include <intelblocks/cse.h>
 #include <intelblocks/early_graphics.h>
+#include <intelblocks/oc_wdt.h>
 #include <intelblocks/pcr.h>
 #include <intelblocks/pmclib.h>
 #include <intelblocks/smbus.h>
@@ -166,6 +167,8 @@ void mainboard_romstage_entry(void)
 	struct chipset_power_state *ps = pmc_get_power_state();
 	bool s3wake = pmc_fill_power_state(ps) == ACPI_S3;
 
+	setup_oc_wdt();
+
 	/* Initialize HECI interface */
 	cse_init(HECI1_BASE_ADDRESS);