Update the rootfs type to ext4 for Overo and Pepper

Gumstix is migrating from ext3 to ext4 file system.

Signed-off-by: Adam YH Lee <adam.yh.lee@gmail.com>
Acked-by: Ash Charles <ashcharles@gmail.com>
diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index 76bf3b6..a1a90ec 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -105,7 +105,7 @@
 	"defaultdisplay=dvi\0" \
 	"mmcdev=0\0" \
 	"mmcroot=/dev/mmcblk0p2 rw\0" \
-	"mmcrootfstype=ext3 rootwait\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
 	"nandroot=ubi0:rootfs ubi.mtd=4\0" \
 	"nandrootfstype=ubifs\0" \
 	"mtdparts=" MTDPARTS_DEFAULT "\0" \