ath9k: report A-MPDU status

The ath9k hardware reports whenever an frame was part
of an A-MPDU. MAC80211 already provides the necessary
API to pass this additional information along to
whomever needs it.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -319,6 +319,8 @@ struct ath_rx {
 	struct ath_rx_edma rx_edma[ATH9K_RX_QUEUE_MAX];
 
 	struct sk_buff *frag;
+
+	u32 ampdu_ref;
 };
 
 int ath_startrecv(struct ath_softc *sc);