mpc85xx: enable ath9k and wpad-mini by default

git-svn-id: svn://svn.openwrt.org/openwrt@36142 3c298f89-4303-0410-b956-a3cf2f4a3e73
valgrind: update to v3.8.1

Signed-off-by: Russell Senior <russell@personaltelco.net>

git-svn-id: svn://svn.openwrt.org/openwrt@36143 3c298f89-4303-0410-b956-a3cf2f4a3e73