cfg80211: add WMM traffic stream API

Add nl80211 and driver API to validate, add and delete traffic
streams with appropriate settings.

The API calls for userspace doing the action frame handshake
with the peer, and then allows only to set up the parameters
in the driver. To avoid setting up a session only to tear it
down again, the validate API is provided, but the real usage
later can still fail so userspace must be prepared for that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 61a09f0..b1be39c 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -166,8 +166,12 @@
 
 #define IEEE80211_MAX_MESH_ID_LEN	32
 
+#define IEEE80211_FIRST_TSPEC_TSID	8
 #define IEEE80211_NUM_TIDS		16
 
+/* number of user priorities 802.11 uses */
+#define IEEE80211_NUM_UPS		8
+
 #define IEEE80211_QOS_CTL_LEN		2
 /* 1d tag mask */
 #define IEEE80211_QOS_CTL_TAG1D_MASK		0x0007