bcm63xx: switch to linux 3.8

git-svn-id: svn://svn.openwrt.org/openwrt@36406 3c298f89-4303-0410-b956-a3cf2f4a3e73
bcm63xx: update patches with upstream submissions

git-svn-id: svn://svn.openwrt.org/openwrt@36407 3c298f89-4303-0410-b956-a3cf2f4a3e73