net: phy: Allow pre-declaration of MDIO devices

Allow board support code to collect pre-declarations for MDIO devices by
registering them with mdiobus_register_board_info(). SPI and I2C buses
have a similar feature, we were missing this for MDIO devices, but this
is particularly useful for e.g: MDIO-connected switches which need to
provide their port layout (often board-specific) to a MDIO Ethernet
switch driver.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio_bus.c

@@ -41,6 +41,8 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/mdio.h>
 
+#include "mdio-boardinfo.h"
+
 int mdiobus_register_device(struct mdio_device *mdiodev)
 {
 	if (mdiodev->bus->mdio_map[mdiodev->addr])
@@ -343,6 +345,8 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
 		}
 	}
 
+	mdiobus_setup_mdiodev_from_board_info(bus);
+
 	bus->state = MDIOBUS_REGISTERED;
 	pr_info("%s: probed\n", bus->name);
 	return 0;