odhcp6c: fix int-overflow after 50d (thx Hauke Mehrtens)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39785 3c298f89-4303-0410-b956-a3cf2f4a3e73
ralink: add support for wrtnode

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39786 3c298f89-4303-0410-b956-a3cf2f4a3e73