ath9k: fix some ANI related stability issues

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40427 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: fix AP mode crash issues

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40428 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: fix user antenna gain calculation

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40429 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: fix warnings triggered by tx power changes when using WDS AP (#15491)

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40430 3c298f89-4303-0410-b956-a3cf2f4a3e73