ath9k: cleanup AR5416 version checking macros

Currently we have two different versions of this macros. Because they
would have to do the same thing, we should simplify and merge them.

Changes-licensed-under: ISC

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/mac.h b/drivers/net/wireless/ath9k/mac.h
index 37e3948..a75f65d 100644
--- a/drivers/net/wireless/ath9k/mac.h
+++ b/drivers/net/wireless/ath9k/mac.h
@@ -17,7 +17,7 @@
 #ifndef MAC_H
 #define MAC_H
 
-#define RXSTATUS_RATE(ah, ads) (AR_SREV_5416_V20_OR_LATER(ah) ?		\
+#define RXSTATUS_RATE(ah, ads) (AR_SREV_5416_20_OR_LATER(ah) ?		\
 				MS(ads->ds_rxstatus0, AR_RxRate) :	\
 				(ads->ds_rxstatus3 >> 2) & 0xFF)