cisco/enic: use eth_hw_addr_random() instead of random_ether_addr()

Use dev_hw_addr_random() instead of calling random_ether_addr()
to set addr_assign_type correctly to NET_ADDR_RANDOM.

Reset the state to NET_ADDR_PERM as soon as the MAC get
changed via .ndo_set_mac_address.

v3: adapt to net-next
v2: use bitops, adapt to eth_hw_addr_random(), add a comment

Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cisco/enic/enic_main.c

@@ -865,6 +865,7 @@ static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 	}
 
 	memcpy(netdev->dev_addr, addr, netdev->addr_len);
+	netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 
 	return 0;
 }
@@ -1119,7 +1120,7 @@ static int enic_set_vf_port(struct net_device *netdev, int vf,
 		memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
 
 	if (vf == PORT_SELF_VF && is_zero_ether_addr(netdev->dev_addr))
-		random_ether_addr(netdev->dev_addr);
+		eth_hw_addr_random(netdev);
 
 	err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
 	if (err) {