ath10k: change ath10k_offchan_tx_work() peer present msg to a warn

Based on the comment block in this function and the FIXME for this, peer
being present for the offchannel tx is unlikely. Peer is deleted once tx
is complete. Change peer present msg to a warn to detect this condition.

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/3b1f71272d56ee1d7f567fbce13bdb56cc06d342.1612915444.git.skhan@linuxfoundation.org

drivers/net/wireless/ath/ath10k/mac.c

@@ -4115,9 +4115,8 @@ void ath10k_offchan_tx_work(struct work_struct *work)
 		spin_unlock_bh(&ar->data_lock);
 
 		if (peer)
-			/* FIXME: should this use ath10k_warn()? */
-			ath10k_dbg(ar, ATH10K_DBG_MAC, "peer %pM on vdev %d already present\n",
-				   peer_addr, vdev_id);
+			ath10k_warn(ar, "peer %pM on vdev %d already present\n",
+				    peer_addr, vdev_id);
 
 		if (!peer) {
 			ret = ath10k_peer_create(ar, NULL, NULL, vdev_id,