libpayload: libcbfs: Fix legacy CBFS API, typos

get_cbfs_header expects CBFS_HEADER_INVALID_ADDRESS (0xffffffff)
instead of NULL when something is wrong.

Also, fix typo.

Change-Id: Ibe56c9eab3b9fdfc6d0b14bc848ca75f3a4fc2f1
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/2455
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
diff --git a/payloads/libpayload/libcbfs/cbfs_core.c b/payloads/libpayload/libcbfs/cbfs_core.c
index 4fecd40..9bae188 100644
--- a/payloads/libpayload/libcbfs/cbfs_core.c
+++ b/payloads/libpayload/libcbfs/cbfs_core.c
@@ -62,8 +62,8 @@
 	if (media == CBFS_DEFAULT_MEDIA) {
 		media = &default_media;
 		if (init_default_cbfs_media(media) != 0) {
-			ERROR("Failed to initializee default media.\n");
-			return NULL;
+			ERROR("Failed to initialize default media.\n");
+			return CBFS_HEADER_INVALID_ADDRESS;
 		}
 	}
 
@@ -103,7 +103,7 @@
 	if (media == CBFS_DEFAULT_MEDIA) {
 		media = &default_media;
 		if (init_default_cbfs_media(media) != 0) {
-			ERROR("Failed to initializee default media.\n");
+			ERROR("Failed to initialize default media.\n");
 			return NULL;
 		}
 	}