ath9k: remove useless flag conversation.

some flags used only outside of ath9k - In this case we can use
"enum mac80211_rx_flags" and pass it upstream without extra
conversation.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 498fee0..a52081d 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -547,6 +547,7 @@
 
 	rs->rs_status = 0;
 	rs->rs_flags = 0;
+	rs->flag = 0;
 
 	rs->rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
 	rs->rs_tstamp = ads.AR_RcvTimestamp;
@@ -586,10 +587,12 @@
 	rs->rs_moreaggr =
 		(ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
 	rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
-	rs->rs_flags =
-		(ads.ds_rxstatus3 & AR_GI) ? ATH9K_RX_GI : 0;
-	rs->rs_flags |=
-		(ads.ds_rxstatus3 & AR_2040) ? ATH9K_RX_2040 : 0;
+
+	/* directly mapped flags for ieee80211_rx_status */
+	rs->flag |=
+		(ads.ds_rxstatus3 & AR_GI) ? RX_FLAG_SHORT_GI : 0;
+	rs->flag |=
+		(ads.ds_rxstatus3 & AR_2040) ? RX_FLAG_40MHZ : 0;
 
 	if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
 		rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;