ath9k: Fix descriptors for keep-alive frame

Along with AR9462, AR9565 also has an extra field
in the TX descriptor which needs to be zeroed out
for the keep alive frame. This makes the earlier
REG_WRITE redundant, so it can be removed.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath9k/ar9003_wow.c

@@ -74,8 +74,6 @@ static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
 	for (i = 0; i < KAL_NUM_DESC_WORDS; i++)
 		REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
 
-	REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
-
 	data_word[0] = (KAL_FRAME_TYPE << 2) | (KAL_FRAME_SUB_TYPE << 4) |
 		       (KAL_TO_DS << 8) | (KAL_DURATION_ID << 16);
 	data_word[1] = (ap_mac_addr[3] << 24) | (ap_mac_addr[2] << 16) |
@@ -88,9 +86,11 @@ static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
 		       (ap_mac_addr[1] << 8) | (ap_mac_addr[0]);
 	data_word[5] = (ap_mac_addr[5] << 8) | (ap_mac_addr[4]);
 
-	if (AR_SREV_9462_20(ah)) {
-		/* AR9462 2.0 has an extra descriptor word (time based
-		 * discard) compared to other chips */
+	if (AR_SREV_9462_20_OR_LATER(ah) || AR_SREV_9565(ah)) {
+		/*
+		 * AR9462 2.0 and AR9565 have an extra descriptor word
+		 * (time based discard) compared to other chips.
+		 */
 		REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + (12 * 4)), 0);
 		wow_ka_data_word0 = AR_WOW_TXBUF(13);
 	} else {
@@ -99,7 +99,6 @@ static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
 
 	for (i = 0; i < KAL_NUM_DATA_WORDS; i++)
 		REG_WRITE(ah, (wow_ka_data_word0 + i*4), data_word[i]);
-
 }
 
 int ath9k_hw_wow_apply_pattern(struct ath_hw *ah, u8 *user_pattern,