ath9k: move ath9k_beacon_config_ap common

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/common-beacon.h b/drivers/net/wireless/ath/ath9k/common-beacon.h
index d8e7c0d..3665d27 100644
--- a/drivers/net/wireless/ath/ath9k/common-beacon.h
+++ b/drivers/net/wireless/ath/ath9k/common-beacon.h
@@ -21,3 +21,6 @@
 				struct ath9k_beacon_state *bs);
 void ath9k_cmn_beacon_config_adhoc(struct ath_hw *ah,
 				   struct ath_beacon_config *conf);
+void ath9k_cmn_beacon_config_ap(struct ath_hw *ah,
+				struct ath_beacon_config *conf,
+				unsigned int bc_buf);