selfload: check target memory type in selfload_check

Currently, selflock_check() verifies that the binary is loaded in an
usable RAM area.

Extend its functionality so we can also check that BL31 is loaded in
a manually reserved area, and fail early if the range is not protected.

Change-Id: Iecdeedd9e8da67f73ac47d2a82e85b306469a626
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://review.coreboot.org/c/31122
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/lib/prog_loaders.c

@@ -182,7 +182,7 @@ void payload_load(void)
 
 	switch (prog_cbfs_type(payload)) {
 	case CBFS_TYPE_SELF: /* Simple ELF */
-		selfload_check(payload);
+		selfload_check(payload, BM_MEM_RAM);
 		break;
 	case CBFS_TYPE_FIT: /* Flattened image tree */
 		if (IS_ENABLED(CONFIG_PAYLOAD_FIT_SUPPORT)) {