kernel: update linux 3.8 to 3.8.3

Also refresh the related generic/platform patches.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36039 3c298f89-4303-0410-b956-a3cf2f4a3e73