ath9k: remove pointless wrapper ath_rc_rate_getidx()

This is just calling another helper, so just use the other
helper directly. This should make it clear that when do not
find the next rate we stick to the current one.

Cc: Derek Smithies <derek@indranet.co.nz>
Cc: Chittajit Mitra <Chittajit.Mitra@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/rc.c

@@ -814,19 +814,6 @@ static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
 	tx_info->control.rts_cts_rate_idx = cix;
 }
 
-static u8 ath_rc_rate_getidx(struct ath_softc *sc,
-			     struct ath_rate_priv *ath_rc_priv,
-			     const struct ath_rate_table *rate_table,
-			     u8 rix)
-{
-	u8 nextindex = 0;
-	if (ath_rc_get_nextlowervalid_txrate(rate_table,
-					     ath_rc_priv, rix, &nextindex))
-		return nextindex;
-	else
-		return rix;
-}
-
 static void ath_rc_ratefind(struct ath_softc *sc,
 			    struct ath_rate_priv *ath_rc_priv,
 			    struct ieee80211_tx_rate_control *txrc)
@@ -865,8 +852,8 @@ static void ath_rc_ratefind(struct ath_softc *sc,
 		/* Get the next tried/allowed rate. No RTS for the next series
 		 * after the probe rate
 		 */
-		nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
-					  rate_table, nrix);
+		ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
+						 rix, &nrix);
 		ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
 				       try_per_rate, nrix, 0);
 
@@ -883,8 +870,8 @@ static void ath_rc_ratefind(struct ath_softc *sc,
 		if (i + 1 == 4)
 			try_per_rate = 4;
 
-		nrix = ath_rc_rate_getidx(sc, ath_rc_priv,
-					  rate_table, nrix);
+		ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
+						 rix, &nrix);
 		/* All other rates in the series have RTS enabled */
 		ath_rc_rate_set_series(rate_table, &rates[i], txrc,
 				       try_per_rate, nrix, 1);