net: fix mdio section mismatch warning

This fixes the following warning:

WARNING: drivers/net/phy/built-in.o(.devexit.text+0x70): Section mismatch in reference from the function .mdio_gpio_bus_destroy() to the function .devinit.text:.mdio_gpio_bus_deinit()
The function __devexit .mdio_gpio_bus_destroy() references
a function __devinit .mdio_gpio_bus_deinit().
This is often seen when error handling in the exit function
uses functionality in the init path.
The fix is often to remove the __devinit annotation of
.mdio_gpio_bus_deinit() so it may be used outside an init section.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-gpio.c

@@ -139,7 +139,7 @@ static struct mii_bus * __devinit mdio_gpio_bus_init(struct device *dev,
 	return NULL;
 }
 
-static void __devinit mdio_gpio_bus_deinit(struct device *dev)
+static void mdio_gpio_bus_deinit(struct device *dev)
 {
 	struct mii_bus *bus = dev_get_drvdata(dev);
 	struct mdio_gpio_info *bitbang = bus->priv;