ath9k: Use bitfields to store tid's state in a single variable

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 02931a1..ff283dc 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1909,8 +1909,8 @@
 	state = si->ampdu_mlme.tid_state_tx[tidno];
 
 	if (state & HT_ADDBA_RECEIVED_MSK) {
-		txtid->addba_exchangecomplete = 1;
-		txtid->addba_exchangeinprogress = 0;
+		txtid->state |= AGGR_ADDBA_COMPLETE;
+		txtid->state &= ~AGGR_ADDBA_PROGRESS;
 		txtid->baw_size = buffersize;
 
 		DPRINTF(sc, ATH_DBG_AGGR,