igbvf, ixgbevf: use dev_hw_addr_random

Both igbvf and ixgbevf should set addr_assign_type to NET_ADDR_RANDOM
so udev creates persistent net rules by matching the device path.
Do this by using the dev_hw_addr_random helper function.

Signed-off-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index 5e2b2a8..048595b 100644
--- a/drivers/net/igbvf/netdev.c
+++ b/drivers/net/igbvf/netdev.c
@@ -2751,7 +2751,7 @@
 		dev_info(&pdev->dev,
 			 "PF still in reset state, assigning new address."
 			 " Is the PF interface up?\n");
-		random_ether_addr(hw->mac.addr);
+		dev_hw_addr_random(adapter->netdev, hw->mac.addr);
 	} else {
 		err = hw->mac.ops.read_mac_addr(hw);
 		if (err) {