bcm63xx_enet: use an unique MDIO bus name.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bcm63xx_enet.c

@@ -1727,7 +1727,7 @@ static int __devinit bcm_enet_probe(struct platform_device *pdev)
 		bus->priv = priv;
 		bus->read = bcm_enet_mdio_read_phylib;
 		bus->write = bcm_enet_mdio_write_phylib;
-		sprintf(bus->id, "%d", priv->mac_id);
+		sprintf(bus->id, "%s-%d", pdev->name, priv->mac_id);
 
 		/* only probe bus where we think the PHY is, because
 		 * the mdio read operation return 0 instead of 0xffff