net: um: 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 go through appropriate helpers.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/um/drivers/net_kern.c

@@ -276,7 +276,7 @@ static const struct ethtool_ops uml_net_ethtool_ops = {
 
 void uml_net_setup_etheraddr(struct net_device *dev, char *str)
 {
-	unsigned char *addr = dev->dev_addr;
+	u8 addr[ETH_ALEN];
 	char *end;
 	int i;
 
@@ -316,6 +316,7 @@ void uml_net_setup_etheraddr(struct net_device *dev, char *str)
 		       addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4],
 		       addr[5]);
 	}
+	eth_hw_addr_set(dev, addr);
 	return;
 
 random: