net: mdio: setup of_node for the MDIO device

By mistake, the of_node of the MDIO device was not setup in the patch
linked below. As a consequence, any PHY driver that depends on the
of_node in its probe callback was not be able to successfully finish its
probe on a PHY, thus the Generic PHY driver was used instead.

Fix this by actually setting up the of_node.

Fixes: bc1bee3b ("net: mdiobus: Introduce fwnode_mdiobus_register_phy()")
Signed-off-by: NIoana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/mdio/fwnode_mdio.c

@@ -65,6 +65,7 @@ int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
 	 * can be looked up later
 	 */
 	fwnode_handle_get(child);
+	phy->mdio.dev.of_node = to_of_node(child);
 	phy->mdio.dev.fwnode = child;
 
 	/* All data is now stored in the phy struct;