ath9k: dynack: properly set last timeout timestamp in ath_dynack_reset

Add compute timeout to last computation timestamp in
ath_dynack_reset in order to not run ath_dynack_compute_ackto
immediately

Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

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

@@ -338,7 +338,7 @@ void ath_dynack_reset(struct ath_hw *ah)
 	u32 ackto = 9 + 16 + 64;
 	struct ath_dynack *da = &ah->dynack;
 
-	da->lto = jiffies;
+	da->lto = jiffies + COMPUTE_TO;
 	da->ackto = ackto;
 
 	da->st_rbf.t_rb = 0;