oxnas: re-enable ubifs

After the changes make ubinize.cfg optional in image.mk, ubifs
generation can now safely be enabled again.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 43789

target/linux/oxnas/Makefile

@@ -10,7 +10,7 @@ ARCH:=arm
 BOARD:=oxnas
 BOARDNAME:=PLXTECH/Oxford NAS782x/OX82x
 DEVICE_TYPE:=nas
-FEATURES:=gpio nand pcie usb usbgadget ramdisk rtc squashfs
+FEATURES:=gpio nand pcie usb usbgadget ramdisk rtc squashfs ubifs
 CPU_TYPE:=mpcore
 
 MAINTAINER:=Daniel Golle <daniel@makrotopia.org>