mac80211: common work skb freeing

All the management processing functions free the
skb after they are done, so this can be done in
the new common code instead.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 14212ad..1bf276d 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -738,9 +738,10 @@
 			break;
 		default:
 			WARN(1, "frame for unexpected interface type");
-			kfree_skb(skb);
 			break;
 		}
+
+		kfree_skb(skb);
 	}
 
 	/* then other type-dependent work */