ath9k: add a tx locking fix

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39684 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: enable u-apsd support

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39685 3c298f89-4303-0410-b956-a3cf2f4a3e73
mac80211: merge some upstream fixes

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39686 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: show more reset causes in debugfs

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39687 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: fix issues that have been plaguing some powersave clients since the tx queueing rework (#14092)

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39688 3c298f89-4303-0410-b956-a3cf2f4a3e73