Wireless HW without any dedicated queues for aggregation
do not need the ampdu_queues mechanism present right now
in mac80211. Since mac80211 is still incomplete wrt TX MQ
changes, do not allow aggregation sessions for drivers that
set ampdu_queues.

This is only an interim hack until Intel fixes the requeue issue.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NLuis Rodriguez <Luis.Rodriguez@Atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>