mac80211: 802.11p OCB mode support

This patch adds 802.11p OCB (Outside the Context of a BSS) mode
support.

When communicating in OCB mode a mandatory wildcard BSSID
(48 '1' bits) is used.

The EDCA parameters handling function was changed to support
802.11p specific values.

The insertion of a newly discovered STAs is done in the similar way
as in the IBSS mode -- through the deferred insertion.

The OCB mode uses a periodic 'housekeeping task' for expiration of
disconnected STAs (in the similar manner as in the MESH mode).

New Kconfig option for verbose OCB debugging outputs is added.

Signed-off-by: Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/debug.h

@@ -2,6 +2,12 @@
 #define __MAC80211_DEBUG_H
 #include <net/cfg80211.h>
 
+#ifdef CONFIG_MAC80211_OCB_DEBUG
+#define MAC80211_OCB_DEBUG 1
+#else
+#define MAC80211_OCB_DEBUG 0
+#endif
+
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
 #define MAC80211_IBSS_DEBUG 1
 #else
@@ -131,6 +137,10 @@ do {									\
 	_sdata_dbg(MAC80211_HT_DEBUG && net_ratelimit(),		\
 		   sdata, fmt, ##__VA_ARGS__)
 
+#define ocb_dbg(sdata, fmt, ...)					\
+	_sdata_dbg(MAC80211_OCB_DEBUG,					\
+		   sdata, fmt, ##__VA_ARGS__)
+
 #define ibss_dbg(sdata, fmt, ...)					\
 	_sdata_dbg(MAC80211_IBSS_DEBUG,					\
 		   sdata, fmt, ##__VA_ARGS__)