soc/amd/common/block: Add support for common config for AMD SoCs

This change adds support for struct soc_amd_common_config that allows
multiple AMD SoCs to share common configuration. This can then be used
by common/block drivers to get the required configuration from device
tree. It also provides function declaration for
soc_get_common_config() that needs to be provided by SoCs making use
of the common configuration structure.

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: Idb0d797525414c99894a8e4ede65469381db7794
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41246
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/common/block/include/amdblocks/chip.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef __AMDBLOCKS_CHIP_H__
+#define __AMDBLOCKS_CHIP_H__
+
+struct soc_amd_common_config {
+};
+
+/*
+ * SoC callback that returns pointer to soc_amd_common_config structure embedded within the chip
+ * soc config.
+ */
+const struct soc_amd_common_config *soc_get_common_config(void);
+
+#endif