imx: ventana: config: enable EXT4 filesystem read/write support

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

include/configs/gw_ventana.h

@@ -112,6 +112,8 @@
 
 /* Filesystem support */
 #define CONFIG_CMD_EXT2
+#define CONFIG_CMD_EXT4
+#define CONFIG_CMD_EXT4_WRITE
 #define CONFIG_CMD_FAT
 #define CONFIG_CMD_UBIFS
 #define CONFIG_DOS_PARTITION