soc/amd: Define post codes

For the most part, this doesn't change any post codes, simply making the
existing post-codes into macros.

picasso/romstage.c did get a couple of post codes removed to match the
other files.

The POST_ROMSTAGE and POST_BOOTBLOCK codes are intended to become global
at some point, while the POST_AGESA and POST_PSP codes would stay AMD
specific.

Change-Id: I007a09b6a3ed3280bac674cd74e298ec5c408ab7
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69867
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/soc/amd/stoneyridge/chip.c b/src/soc/amd/stoneyridge/chip.c
index 1633ecd..0a530fc 100644
--- a/src/soc/amd/stoneyridge/chip.c
+++ b/src/soc/amd/stoneyridge/chip.c
@@ -15,6 +15,7 @@
 #include <amdblocks/agesawrapper.h>
 #include <amdblocks/agesawrapper_call.h>
 #include <amdblocks/i2c.h>
+#include <amdblocks/post_codes.h>
 
 #include "chip.h"
 
@@ -115,15 +116,15 @@
 static void earliest_ramstage(void *unused)
 {
 	if (!acpi_is_wakeup_s3()) {
-		post_code(0x46);
+		post_code(POST_PSP_LOAD_SMU);
 		if (CONFIG(SOC_AMD_PSP_SELECTABLE_SMU_FW))
 			psp_load_named_blob(BLOB_SMU_FW2, "smu_fw2");
 
-		post_code(0x47);
+		post_code(POST_AGESA_AMDINITENV);
 		do_agesawrapper(AMD_INIT_ENV, "amdinitenv");
 	} else {
 		/* Complete the initial system restoration */
-		post_code(0x46);
+		post_code(POST_AGESA_AMDS3LATERESTORE);
 		do_agesawrapper(AMD_S3LATE_RESTORE, "amds3laterestore");
 	}
 }