soc/amd/phoenix: use common SMU S3/4/5 entry message code

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ie7ded68f4732ec12a1c7e59445d572763a03c3b9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71879
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>

src/soc/amd/phoenix/Kconfig

@@ -65,6 +65,7 @@ config SOC_AMD_PHOENIX
 	select SOC_AMD_COMMON_BLOCK_SMI
 	select SOC_AMD_COMMON_BLOCK_SMM
 	select SOC_AMD_COMMON_BLOCK_SMU
+	select SOC_AMD_COMMON_BLOCK_SMU_SX_ENTRY
 	select SOC_AMD_COMMON_BLOCK_SPI
 	select SOC_AMD_COMMON_BLOCK_TSC_FAM17H_19H
 	select SOC_AMD_COMMON_BLOCK_UART

src/soc/amd/phoenix/Makefile.inc

@@ -47,7 +47,6 @@ ramstage-y	+= xhci.c
 
 smm-y		+= gpio.c
 smm-y		+= smihandler.c
-smm-y		+= smu.c
 smm-$(CONFIG_DEBUG_SMI) += uart.c
 
 CPPFLAGS_common += -I$(src)/soc/amd/phoenix/include

src/soc/amd/phoenix/smu.c

@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#include <console/console.h>
-#include <amdblocks/smu.h>
-#include <soc/smu.h>
-
-/* TODO: can this be made common? */
-
-/*
- * Request the SMU to put system into S3, S4, or S5. On entry, SlpTyp determines S-State and
- * SlpTypeEn gets set by the SMU. Function does not return if successful.
- */
-void smu_sx_entry(void)
-{
-	struct smu_payload msg = { 0 }; /* Unused for SMC_MSG_S3ENTRY */
-
-	printk(BIOS_DEBUG, "SMU: Put system into S3/S4/S5\n");
-	send_smu_message(SMC_MSG_S3ENTRY, &msg);
-}