[MAC80211]: rename ieee80211_cfg.c to cfg.c

It's just painful to have the extra ieee80211_ prefix.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index 7937338..219cd9f 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -17,7 +17,7 @@
 	regdomain.o \
 	tkip.o \
 	aes_ccm.o \
-	ieee80211_cfg.o \
+	cfg.o \
 	rx.o \
 	tx.o \
 	key.o \