carl9170: fix breakage from "mac80211: handle non-bufferable MMPDUs correctly"

That commit intended for 3.4 renamed IEEE80211_TX_CTL_POLL_RESPONSE as
IEEE80211_TX_CTL_NO_PS_BUFFER.  Meanwhile, "carl9170: fix frame delivery
if sta is in powersave mode" added a reference to
IEEE80211_TX_CTL_POLL_RESPONSE in the fixes stream for 3.3.  This simple
patch fixes that merge boo-boo.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c
index 0f00721..aed3051 100644
--- a/drivers/net/wireless/ath/carl9170/tx.c
+++ b/drivers/net/wireless/ath/carl9170/tx.c
@@ -1247,7 +1247,7 @@
 	tx_info = IEEE80211_SKB_CB(skb);
 
 	if (unlikely(sta_info->sleeping) &&
-	    !(tx_info->flags & (IEEE80211_TX_CTL_POLL_RESPONSE |
+	    !(tx_info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
 				IEEE80211_TX_CTL_CLEAR_PS_FILT))) {
 		rcu_read_unlock();