ptp: ptp_ines: Remove redundant null check

Because kfree_skb already checked NULL skb parameter,
so the additional check is unnecessary, just remove it.

Signed-off-by: Xu Wang <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/ptp/ptp_ines.c

···
 
 	spin_unlock_irqrestore(&port->lock, flags);
 
-	if (old_skb)
-		kfree_skb(old_skb);
+	kfree_skb(old_skb);
 
 	schedule_delayed_work(&port->ts_work, 1);
 }