rt2x00: Implement WDS support

WDS support should be very easy to handle, mac80211 handles
everything for us, so all that is needed is to set the
support flags and handle it in the add_interface() callback.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index 137386e..e6fba83 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -227,6 +227,7 @@
 	case NL80211_IFTYPE_STATION:
 	case NL80211_IFTYPE_ADHOC:
 	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_WDS:
 		/*
 		 * We don't support mixed combinations of
 		 * sta and ap interfaces.