mac80211: make ieee80211_rx_mgmt_action static

The function is only used locally.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 3978ad6..2e225ae 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -1994,10 +1994,10 @@
 	ieee80211_sta_tx(dev, skb, 0);
 }
 
-void ieee80211_rx_mgmt_action(struct net_device *dev,
-			     struct ieee80211_if_sta *ifsta,
-			     struct ieee80211_mgmt *mgmt,
-			     size_t len)
+static void ieee80211_rx_mgmt_action(struct net_device *dev,
+				     struct ieee80211_if_sta *ifsta,
+				     struct ieee80211_mgmt *mgmt,
+				     size_t len)
 {
 	if (len < IEEE80211_MIN_ACTION_SIZE)
 		return;