phy: add phydev_name() wrapper

Add a phydev_name() function, to help with moving some structure members
from phy_device.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 0576651..5801aa1 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -797,7 +797,7 @@
 		netdev_info(ndev, "using MII interface\n");
 	else
 		netdev_info(ndev, "using RMII interface\n");
-	phydev = phy_connect(ndev, dev_name(&phydev->dev),
+	phydev = phy_connect(ndev, phydev_name(phydev),
 			     &lpc_handle_link_change,
 			     lpc_phy_interface_mode(&pldat->pdev->dev));
 
@@ -818,7 +818,7 @@
 
 	netdev_info(ndev,
 		"attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
-		phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
+		phydev->drv->name, phydev_name(phydev), phydev->irq);
 	return 0;
 }