ath11k: fix missing unlock on error in ath11k_wow_op_resume()

Add the missing unlock before return from function ath11k_wow_op_resume()
in the error handling case.

Fixes: 90bf5c8d ("ath11k: purge rx pktlog when entering WoW")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220408030912.3087293-1-yangyingliang@huawei.com

drivers/net/wireless/ath/ath11k/wow.c

@@ -758,7 +758,7 @@ int ath11k_wow_op_resume(struct ieee80211_hw *hw)
 	ret = ath11k_dp_rx_pktlog_start(ar->ab);
 	if (ret) {
 		ath11k_warn(ar->ab, "failed to start rx pktlog from wow: %d\n", ret);
-		return ret;
+		goto exit;
 	}
 
 	ret = ath11k_wow_wakeup(ar->ab);