mac80211: rename files

This patch renames all mac80211 files (except ieee80211_i.h) to get rid
of the useless ieee80211_ prefix.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 30fd328..f8c95bc 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -12,7 +12,7 @@
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/if_ether.h>
-#include "ieee80211_key.h"
+#include "key.h"
 
 /**
  * enum ieee80211_sta_info_flags - Stations flags