[PATCH] ipw2200: Fix TX QoS enabled frames problem

This patch works with the ieee80211 stack to set the correct QoS bit to the
ipw2200 card. It fixed the TX failure problem for using WPA with QoS.

Signed-off-by: Hong Liu <hong.liu@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>