ath9k: rename ath_rc_get_nextlowervalid_txrate()

What this does is get us our next lower rate so call it that,
ath_rc_get_lower_rix().

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

@@ -501,7 +501,7 @@ static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
 }
 
 static inline int
-ath_rc_get_nextlowervalid_txrate(const struct ath_rate_table *rate_table,
+ath_rc_get_lower_rix(const struct ath_rate_table *rate_table,
 		     struct ath_rate_priv *ath_rc_priv,
 		     u8 cur_valid_txrate, u8 *next_idx)
 {
@@ -852,8 +852,7 @@ 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
 		 */
-		ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
-						 rix, &nrix);
+		ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &nrix);
 		ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
 				       try_per_rate, nrix, 0);
 
@@ -870,8 +869,7 @@ static void ath_rc_ratefind(struct ath_softc *sc,
 		if (i + 1 == 4)
 			try_per_rate = 4;
 
-		ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
-						 rix, &nrix);
+		ath_rc_get_lower_rix(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);
@@ -1156,7 +1154,7 @@ static void ath_rc_update_ht(struct ath_softc *sc,
 	if (ath_rc_priv->state[tx_rate].per >= 55 && tx_rate > 0 &&
 	    rate_table->info[tx_rate].ratekbps <=
 	    rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
-		ath_rc_get_nextlowervalid_txrate(rate_table, ath_rc_priv,
+		ath_rc_get_lower_rix(rate_table, ath_rc_priv,
 				     (u8)tx_rate, &ath_rc_priv->rate_max_phy);
 
 		/* Don't probe for a little while. */