rtw88: adjust the log level for failure of tx report

We find that some disconnect events are related to failure of
tx report, so increase log level to improve debuggability.
Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210713104524.47101-1-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/tx.c

@@ -162,7 +162,7 @@ void rtw_tx_report_purge_timer(struct timer_list *t)
 	if (skb_queue_len(&tx_report->queue) == 0)
 		return;
 
-	rtw_dbg(rtwdev, RTW_DBG_TX, "purge skb(s) not reported by firmware\n");
+	rtw_warn(rtwdev, "failed to get tx report from firmware\n");
 
 	spin_lock_irqsave(&tx_report->q_lock, flags);
 	skb_queue_purge(&tx_report->queue);