pxa: mark as broken

It still uses the long obsolete 3.3 kernel version

SVN-Revision: 44108

target/linux/pxa/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=arm
 BOARD:=pxa
 BOARDNAME:=Marvell/Intel PXA2xx
-FEATURES:=squashfs
+FEATURES:=squashfs broken
 MAINTAINER:=Imre Kaloz <[email protected]>
 
 KERNEL_PATCHVER:=3.3