soc/amd/cezanne: add config.c and minimal chip.h

Change-Id: I89f08c201bd7d9a11b186ef960abe9714a76fb97
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48317
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/amd/cezanne/Makefile.inc

@@ -2,6 +2,8 @@
 
 ifeq ($(CONFIG_SOC_AMD_CEZANNE),y)
 
+all-y += config.c
+
 bootblock-y	+= bootblock.c
 
 romstage-y	+= romstage.c

src/soc/amd/cezanne/chip.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <device/device.h>
+#include "chip.h"
 
 struct chip_operations soc_amd_cezanne_ops = { NULL };

src/soc/amd/cezanne/chip.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef CEZANNE_CHIP_H
+#define CEZANNE_CHIP_H
+
+#include <amdblocks/chip.h>
+
+struct soc_amd_cezanne_config {
+	struct soc_amd_common_config common_config;
+};
+
+#endif /* CEZANNE_CHIP_H */

src/soc/amd/cezanne/config.c

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/chip.h>
+#include <device/device.h>
+#include "chip.h"
+
+const struct soc_amd_common_config *soc_get_common_config()
+{
+	/* config_of_soc calls die() internally if cfg was NULL, so no need to re-check */
+	const struct soc_amd_cezanne_config *cfg = config_of_soc();
+	return &cfg->common_config;
+}