soc/amd/common/fsp: Introduce SOC_AMD_COMMON_FSP_PRELOAD_FSPS

The function to start preloading the fsp-s is identical in cezanne and
newer socs, so move it to common with a new Kconfig option to enable it.

Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: Ia572c99928f4a60896b7a861ab6fb3f1257ac1cc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71844
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/amd/common/fsp/Kconfig

@@ -6,6 +6,9 @@ config SOC_AMD_COMMON_FSP_DMI_TABLES
 config SOC_AMD_COMMON_FSP_CCX_CPPC_HOB
 	bool
 
+config SOC_AMD_COMMON_FSP_PRELOAD_FSPS
+	bool
+
 source "src/soc/amd/common/fsp/*/Kconfig"
 
 endif # PLATFORM_USES_FSP2_0

src/soc/amd/common/fsp/Makefile.inc

@@ -6,6 +6,7 @@ ramstage-y += fsp_reset.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += fsp-acpi.c
 ramstage-$(CONFIG_SOC_AMD_COMMON_FSP_CCX_CPPC_HOB) += fsp_ccx_cppc_hob.c
 ramstage-$(CONFIG_SOC_AMD_COMMON_FSP_DMI_TABLES) += dmi.c
+ramstage-$(CONFIG_SOC_AMD_COMMON_FSP_PRELOAD_FSPS) += preload_fsps.c
 
 subdirs-y += ./*
 

src/soc/amd/common/fsp/preload_fsps.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootstate.h>
+#include <fsp/api.h>
+
+static void start_fsps_preload(void *unused)
+{
+	preload_fsps();
+}
+
+BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, start_fsps_preload, NULL);