configs/olimex_imx233_olinuxino: Add EXT4 support

Select BR2_TARGET_ROOTFS_EXT4 so that an EXT4 rootfs can be generated.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/olimex_imx233_olinuxino_defconfig

@@ -32,6 +32,7 @@ BR2_PACKAGE_ZD1211_FIRMWARE=y
 
 # Filesystem
 BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT4=y
 # BR2_TARGET_ROOTFS_TAR is not set
 
 # U-Boot