mac80211: add PLINK_ prefix and kernel doc to enum plink_state

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 8e1e285..644d277 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -411,7 +411,7 @@
 	 * establisment frame, beacon or probe, drop the frame.
 	 */
 
-	if (!rx->sta || sta_plink_state(rx->sta) != ESTAB) {
+	if (!rx->sta || sta_plink_state(rx->sta) != PLINK_ESTAB) {
 		struct ieee80211_mgmt *mgmt;
 
 		if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)