cbfstool: Fix possible memory leak

Handle the possible memory leak scenario.

Foundby=klocwork
BUG=NONE
TEST=Boot to OS on Nivviks

Change-Id: I01c4643d1e671d9bd9971ac6db8031634fffd61e
Signed-off-by: Shaik Shahina <shahina.shaik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69220
Reviewed-by: Shahina Shaik <shahina.shaik@intel.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

util/cbfstool/cbfstool.c

@@ -770,8 +770,8 @@ static int cbfs_add_master_header(void)
 	 */
 	if (param.topswap_size) {
 		if (update_master_header_loc_topswap(&image, h_loc,
-							header_offset))
-			return 1;
+						     header_offset))
+			goto done;
 	}
 
 	ret = maybe_update_metadata_hash(&image);