configs/lego_ev3: use ext4 file system

Change from using ext3 to ext4.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

configs/lego_ev3_defconfig

@@ -27,7 +27,7 @@ BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="board/lego/ev3/busybox.fragment"
 
 # filesystem
 BR2_TARGET_ROOTFS_EXT2=y
-BR2_TARGET_ROOTFS_EXT2_3=y
+BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_SQUASHFS=y
 BR2_TARGET_ROOTFS_SQUASHFS4_XZ=y
 # BR2_TARGET_ROOTFS_TAR is not set