spl: do not hang in spl_register_fat_device but return error value. It allows to use both CONFIG_SPL_FAT_SUPPORT and CONFIG_SPL_EXT_SUPPORT.

Do not hang in spl_register_fat_device but return an error value.
It allows to use both CONFIG_SPL_FAT_SUPPORT and CONFIG_SPL_EXT_SUPPORT.
If FAT load fails, then EXT load is tried.

Signed-off-by: Guillaume GARDET <guillaume.gardet@free.fr>
Cc: Tom Rini <trini@ti.com>

common/spl/spl_fat.c

@@ -30,7 +30,7 @@ static int spl_register_fat_device(block_dev_desc_t *block_dev, int partition)
 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
 		printf("%s: fat register err - %d\n", __func__, err);
 #endif
-		hang();
+		return err;
 	}
 
 	fat_registered = 1;