[MAC80211]: split TX path into own file

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index 0353e75..8482602 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -19,4 +19,5 @@
 	aes_ccm.o \
 	ieee80211_cfg.o \
 	rx.o \
+	tx.o \
 	$(mac80211-objs-y)