ath9k: rename ath_rc_ratefind_ht() to ath_rc_get_highest_rix()

The purpose is to find the highest rate we can use.

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

@@ -601,7 +601,8 @@ static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv,
 	return hi;
 }
 
-static u8 ath_rc_ratefind_ht(struct ath_softc *sc,
+/* Finds the highest rate index we can use */
+static u8 ath_rc_get_highest_rix(struct ath_softc *sc,
 			         struct ath_rate_priv *ath_rc_priv,
 				 const struct ath_rate_table *rate_table,
 				 int *is_probing)
@@ -812,7 +813,7 @@ static void ath_rc_ratefind(struct ath_softc *sc,
 	try_per_rate = sc->hw->max_rate_tries;
 
 	rate_table = sc->cur_rate_table;
-	rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table, &is_probe);
+	rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe);
 	nrix = rix;
 
 	if (is_probe) {