igep00x0: default mmcrootfstype to EXT4

omap2plus_defconfig now has built-in compile support for EXT4 enabled
by default now. So, we can use EXT4 as the default root file system
type for MMC.

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>

include/configs/igep00x0.h

@@ -142,7 +142,7 @@
 	"defaultdisplay=dvi\0" \
 	"mmcdev=0\0" \
 	"mmcroot=/dev/mmcblk0p2 rw\0" \
-	"mmcrootfstype=ext3 rootwait\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
 	"nandroot=/dev/mtdblock4 rw\0" \
 	"nandrootfstype=jffs2\0" \
 	"mmcargs=setenv bootargs console=${console} " \