mvebu: don't generate targz images by default

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>

SVN-Revision: 44268

target/linux/mvebu/Makefile

 #
-# Copyright (C) 2012-2014 OpenWrt.org
+# Copyright (C) 2012-2015 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=arm
 BOARD:=mvebu
 BOARDNAME:=Marvell Armada XP/370
-FEATURES:=targz usb pci pcie gpio nand squashfs
+FEATURES:=usb pci pcie gpio nand squashfs
 CPU_TYPE:=cortex-a9
 CPU_SUBTYPE:=vfpv3
 MAINTAINER:=Imre Kaloz <kaloz@openwrt.org>