rt2x00: FIF_PSPOLL filter flag support

This patch implements FIF_PSPOLL filter flag support in rt2x00 drivers,
which has been introduced in mac80211 (see
http://marc.info/?l=linux-wireless&m=124897986330807&w=2).

Signed-off-by: Igor Perminov <igor.perminov@inbox.ru>
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/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 7c74c4e..5bc100d 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -624,6 +624,8 @@
 	 */
 	CONFIG_SUPPORT_HW_BUTTON,
 	CONFIG_SUPPORT_HW_CRYPTO,
+	DRIVER_SUPPORT_CONTROL_FILTERS,
+	DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL,
 
 	/*
 	 * Driver configuration