mac80211: move QOS control helpers into ieee80211.h

Also remove the WLAN_IS_QOS_DATA inline after removing the last
two users.  This starts moving away from using rx->fc to using
the header frame_control directly.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index aa603c3..a1630ba 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -99,6 +99,8 @@
 #define IEEE80211_MAX_SSID_LEN		32
 #define IEEE80211_MAX_MESH_ID_LEN	32
 #define IEEE80211_QOS_CTL_LEN		2
+#define IEEE80211_QOS_CTL_TID_MASK	0x000F
+#define IEEE80211_QOS_CTL_TAG1D_MASK	0x0007
 
 struct ieee80211_hdr {
 	__le16 frame_control;