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/util.c b/net/mac80211/util.c
index 57c404f..cc9f715 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -25,7 +25,7 @@
 #include <net/rtnetlink.h>
 
 #include "ieee80211_i.h"
-#include "ieee80211_rate.h"
+#include "rate.h"
 #include "mesh.h"
 #include "wme.h"