The patch fixes this compiler's warning:

drivers/net/phy/mdio-gpio.c:48:24: warning: no previous prototype
        for 'mdio_gpio_of_get_info' [-Wmissing-prototypes]
 struct mdio_gpio_info *mdio_gpio_of_get_info(struct device_d *dev)
                        ^

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>