lantiq xway: generate ramdisk image by default

The installation process on nand-based boards using ubi
like the BTHOMEHUBV2B makes use of a ramdisk image, so it
makes sense to generate this by default.

Signed-off-by: Ben Mulvihill <ben.mulvihill@gmail.com>

SVN-Revision: 42920

target/linux/lantiq/xway/target.mk

@@ -1,7 +1,7 @@
 ARCH:=mips
 SUBTARGET:=xway
 BOARDNAME:=XWAY
-FEATURES:=squashfs atm mips16 nand ubifs
+FEATURES:=squashfs atm mips16 nand ubifs ramdisk
 CPU_TYPE:=34kc
 CPU_SUBTYPE:=dsp