qoriq: add squashfs to FEATURES

The snapshot builds for qoriq only contain ext4 images. Add squashfs to
FEATURES to also have the buildbots build squashfs images.

Signed-off-by: Stijn Tintel <[email protected]>

target/linux/qoriq/Makefile

@@ -8,7 +8,7 @@ ARCH:=powerpc64
 BOARD:=qoriq
 BOARDNAME:=NXP QorIQ (PowerPC)
 CPU_TYPE:=e5500
-FEATURES:=boot-part ext4 fpu legacy-sdcard powerpc64 ramdisk rootfs-part rtc
+FEATURES:=boot-part ext4 fpu legacy-sdcard powerpc64 ramdisk rootfs-part rtc squashfs
 SUBTARGETS:=generic
 
 KERNEL_PATCHVER:=6.6