ath9k: write buffer related optimisation in ar5008_hw_set_channel_regs

Signed-off-by: NOleksij Rempel <linux@rempel-privat.de>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath9k/ar5008_phy.c

@@ -681,12 +681,13 @@ static void ar5008_hw_set_channel_regs(struct ath_hw *ah,
 			phymode |= AR_PHY_FC_DYN2040_PRI_CH;
 
 	}
+	ENABLE_REGWRITE_BUFFER(ah);
 	REG_WRITE(ah, AR_PHY_TURBO, phymode);
 
+	/* This function do only REG_WRITE, so
+	 * we can include it to REGWRITE_BUFFER. */
 	ath9k_hw_set11nmac2040(ah, chan);
 
-	ENABLE_REGWRITE_BUFFER(ah);
-
 	REG_WRITE(ah, AR_GTXTO, 25 << AR_GTXTO_TIMEOUT_LIMIT_S);
 	REG_WRITE(ah, AR_CST, 0xF << AR_CST_TIMEOUT_LIMIT_S);