make mtd refresh based config append optional (leave enabled on x86) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12657 3c298f89-4303-0410-b956-a3cf2f4a3e73
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11900 3c298f89-4303-0410-b956-a3cf2f4a3e73
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9069 3c298f89-4303-0410-b956-a3cf2f4a3e73