net: phy: print the function name by __func__ instead of an fixed string

It's better to use __func__ than a fixed string to print a function's
name.
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio_device.c

@@ -77,7 +77,7 @@ int mdio_device_register(struct mdio_device *mdiodev)
 {
 	int err;
 
-	dev_dbg(&mdiodev->dev, "mdio_device_register\n");
+	dev_dbg(&mdiodev->dev, "%s\n", __func__);
 
 	err = mdiobus_register_device(mdiodev);
 	if (err)
@@ -188,7 +188,7 @@ int mdio_driver_register(struct mdio_driver *drv)
 	struct mdio_driver_common *mdiodrv = &drv->mdiodrv;
 	int retval;
 
-	pr_debug("mdio_driver_register: %s\n", mdiodrv->driver.name);
+	pr_debug("%s: %s\n", __func__, mdiodrv->driver.name);
 
 	mdiodrv->driver.bus = &mdio_bus_type;
 	mdiodrv->driver.probe = mdio_probe;