kernel: fix enabling coredump support on 3.7+

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35123 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: extend the unaligned access hacks to a few more places that showed up in the new kernel

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35124 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: add more cpu feature overrides, slightly reduces kernel size

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35125 3c298f89-4303-0410-b956-a3cf2f4a3e73