mvebu: update to 3.8-rc4

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35316 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: refresh 3.8 patches

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35317 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: update linux 3.7 to 3.7.4

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

git-svn-id: svn://svn.openwrt.org/openwrt@35318 3c298f89-4303-0410-b956-a3cf2f4a3e73