x86: remove linux 3.8 support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40453 3c298f89-4303-0410-b956-a3cf2f4a3e73
x86: set default kernel version to 3.10

Place the previous selection (3.3.8) into the only subtarget that did
not override it to 3.10

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40454 3c298f89-4303-0410-b956-a3cf2f4a3e73
x86_64: add usb support (including storage) to the kernel config

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40455 3c298f89-4303-0410-b956-a3cf2f4a3e73