phy: Centralise print about attached phy

Many Ethernet drivers contain the same netdev_info() print statement
about the attached phy. Move it into the phy device code. Additionally
add a varargs function which can be used to append additional
information.

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 5801aa1..024bc36 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -816,9 +816,8 @@
 	pldat->duplex = -1;
 	pldat->phy_dev = phydev;
 
-	netdev_info(ndev,
-		"attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
-		phydev->drv->name, phydev_name(phydev), phydev->irq);
+	phy_attached_info(phydev);
+
 	return 0;
 }