include/program_loading: Add POSTCAR prog type

Now postcar is a standalone stage give it a
proper type.

Change-Id: Ifa6af9cf20aad27ca87a86817e6ad0a0d1de17c8
Signed-off-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-on: https://review.coreboot.org/29545
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

src/arch/x86/postcar_loader.c

@@ -167,7 +167,7 @@ static void load_postcar_cbfs(struct prog *prog, struct postcar_frame *pcf)
 void run_postcar_phase(struct postcar_frame *pcf)
 {
 	struct prog prog =
-		PROG_INIT(PROG_UNKNOWN, CONFIG_CBFS_PREFIX "/postcar");
+		PROG_INIT(PROG_POSTCAR, CONFIG_CBFS_PREFIX "/postcar");
 
 	postcar_commit_mtrrs(pcf);
 

src/include/program_loading.h

@@ -36,6 +36,7 @@ enum prog_type {
 	PROG_PAYLOAD,
 	PROG_BL31,
 	PROG_BL32,
+	PROG_POSTCAR,
 };
 
 /*