ARM: OMAP: omap2plus_defconfig: Enable EXT4 support

On OMAP boards that includes an SD card slot, an EXT4 partition could
be used to store the root file system. So, the kernel should have
built-in support for EXT4 to be able to mount the VFS root on boot.

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 9854ff4..f3087cb 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -197,6 +197,7 @@
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y
 # CONFIG_EXT3_FS_XATTR is not set
+CONFIG_EXT4_FS=y
 CONFIG_QUOTA=y
 CONFIG_QFMT_V2=y
 CONFIG_MSDOS_FS=y