ath9k: Enable IEEE80211_HW_REPORTS_TX_ACK_STATUS flag for ath9k.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 4b5e548..623c2f8 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -622,7 +622,8 @@
 		IEEE80211_HW_SIGNAL_DBM |
 		IEEE80211_HW_SUPPORTS_PS |
 		IEEE80211_HW_PS_NULLFUNC_STACK |
-		IEEE80211_HW_SPECTRUM_MGMT;
+		IEEE80211_HW_SPECTRUM_MGMT |
+		IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 
 	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 		 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;