ath9k: merge a regulatory handling fix

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43028 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: merge ar9580/ar955x initval updates

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43029 3c298f89-4303-0410-b956-a3cf2f4a3e73