ACPI: Add helpers for CBMEM_ID_POWER_STATE

Create uniform logging for the (unlikely) case of a CBMEM
entry disappearing.

Change-Id: I7c5414a03d869423c8ae5192a990fde5f9582f2d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49817
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/soc/intel/common/block/pmc/pmclib.c b/src/soc/intel/common/block/pmc/pmclib.c
index 09af749..3b7aa0a 100644
--- a/src/soc/intel/common/block/pmc/pmclib.c
+++ b/src/soc/intel/common/block/pmc/pmclib.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <acpi/acpi_pm.h>
 #include <arch/io.h>
 #include <bootmode.h>
 #include <device/mmio.h>
@@ -56,7 +57,7 @@
 	struct chipset_power_state *ptr = NULL;
 
 	if (cbmem_possibly_online())
-		ptr = cbmem_find(CBMEM_ID_POWER_STATE);
+		ptr = acpi_get_pm_state();
 
 	/* cbmem is online but ptr is not populated yet */
 	if (ptr == NULL && !(ENV_RAMSTAGE || ENV_POSTCAR))