kernel: generic: add missing arm machtypes

Some machtypes were dropped when 4.0 support was added, and the
incomplete patch was taken over to 4.1.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46187 3c298f89-4303-0410-b956-a3cf2f4a3e73