arch: use eth_hw_addr_set()

Commit 406f42fa ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.

Convert misc arch drivers from memcpy(... ETH_ADDR) to eth_hw_addr_set():

  @@
  expression dev, np;
  @@
  - memcpy(dev->dev_addr, np, ETH_ALEN)
  + eth_hw_addr_set(dev, np)
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/m68k/emu/nfeth.c

@@ -200,7 +200,7 @@ static struct net_device * __init nfeth_probe(int unit)
 	dev->irq = nfEtherIRQ;
 	dev->netdev_ops = &nfeth_netdev_ops;
 
-	memcpy(dev->dev_addr, mac, ETH_ALEN);
+	eth_hw_addr_set(dev, mac);
 
 	priv = netdev_priv(dev);
 	priv->ethX = unit;

arch/xtensa/platforms/iss/network.c

@@ -467,7 +467,7 @@ static int iss_net_set_mac(struct net_device *dev, void *addr)
 	if (!is_valid_ether_addr(hwaddr->sa_data))
 		return -EADDRNOTAVAIL;
 	spin_lock_bh(&lp->lock);
-	memcpy(dev->dev_addr, hwaddr->sa_data, ETH_ALEN);
+	eth_hw_addr_set(dev, hwaddr->sa_data);
 	spin_unlock_bh(&lp->lock);
 	return 0;
 }