ath9k: Remove half/quarter rate tables

Half/Quarter rate tables are needed only for legacy chipsets.

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.h b/drivers/net/wireless/ath9k/rc.h
index 2166243..2d8df83 100644
--- a/drivers/net/wireless/ath9k/rc.h
+++ b/drivers/net/wireless/ath9k/rc.h
@@ -290,7 +290,7 @@
 /*
  * Attach/detach a rate control module.
  */
-struct ath_rate_softc *ath_rate_attach(struct ath_hal *ah);
+struct ath_rate_softc *ath_rate_attach(struct ath_softc *sch);
 void ath_rate_detach(struct ath_rate_softc *asc);
 
 /*