fixup! net: macb: gate TX stall watchdog on netif_carrier_ok, use warn_ratelimited

netdev_warn_ratelimited() does not exist in this kernel; build
fails with implicit-function-declaration.  Replace with the
standard `if (printk_ratelimit()) netdev_warn(...)` form, which
has the same semantics (bounded log noise, retains netdev prefix
in the message) and works in every kernel version.

Reported-by: John Laur <johnlaur@github>
Signed-off-by: Lukasz Raczylo <lukasz@raczylo.com>

Author: lukaszraczylo

drivers/net/ethernet/cadence/macb_main.c

@@ -2094,10 +2094,11 @@ static void macb_tx_stall_watchdog(struct work_struct *work)
 	spin_unlock_irqrestore(&queue->tx_ptr_lock, flags);
 
 	if (stalled) {
-		netdev_warn_ratelimited(bp->dev,
-					"TX stall detected on queue %u (tail=%u head=%u); re-kicking TSTART\n",
-					(unsigned int)(queue - bp->queues),
-					cur_tail, cur_head);
+		if (printk_ratelimit())
+			netdev_warn(bp->dev,
+				    "TX stall detected on queue %u (tail=%u head=%u); re-kicking TSTART\n",
+				    (unsigned int)(queue - bp->queues),
+				    cur_tail, cur_head);
 		macb_tx_restart(queue);
 	}