ath9k: reduce rx buffer allocation size

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38395 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath5k: fix tx status processing errors (causing packet loss and throughput issues)

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38396 3c298f89-4303-0410-b956-a3cf2f4a3e73
ath9k: add some more pending fixes / optimizations

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38398 3c298f89-4303-0410-b956-a3cf2f4a3e73