soc/amd/cezanne: save chipset state to CBMEM

Guybrush complains that this is missing during the boot, so add it to
cezanne. I verified that the registers in gpio.c are correct.

BUG=b:184549804
TEST=Build and boot

Signed-off-by: Martin Roth <martinroth@chromium.org>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I3de3764c99fe89b962db88065575463b365ddaf5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51751
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/amd/cezanne/Kconfig

@@ -50,6 +50,7 @@ config SOC_SPECIFIC_OPTIONS
 	select SOC_AMD_COMMON_BLOCK_PCI
 	select SOC_AMD_COMMON_BLOCK_PCI_MMCONF
 	select SOC_AMD_COMMON_BLOCK_PM
+	select SOC_AMD_COMMON_BLOCK_PM_CHIPSET_STATE_SAVE
 	select SOC_AMD_COMMON_BLOCK_PSP_GEN2
 	select SOC_AMD_COMMON_BLOCK_SMBUS
 	select SOC_AMD_COMMON_BLOCK_SMI

src/soc/amd/cezanne/romstage.c

@@ -4,6 +4,7 @@
 #include <amdblocks/acpimmio.h>
 #include <amdblocks/apob_cache.h>
 #include <amdblocks/memmap.h>
+#include <amdblocks/pmlib.h>
 #include <arch/cpu.h>
 #include <console/console.h>
 #include <fsp/api.h>
@@ -20,6 +21,9 @@ asmlinkage void car_stage_entry(void)
 
 	post_code(0x41);
 
+	/* Snapshot chipset state prior to any FSP call */
+	fill_chipset_state();
+
 	fsp_memory_init(acpi_is_wakeup_s3());
 	soc_update_apob_cache();