ath9k_hw: move AR9002 mac ops to its own file

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index ffb599c..cb4995c 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -15,6 +15,7 @@
  */
 
 #include "ath9k.h"
+#include "ar9003_mac.h"
 
 #define SKB_CB_ATHBUF(__skb)	(*((struct ath_buf **)__skb->cb))