phylib: rename mii_bus::dev to mii_bus::parent

In preparation of giving mii_bus objects a device tree presence of
their own, rename struct mii_bus's ->dev argument to ->parent, since
having a 'struct device *dev' that points to our parent device
conflicts with introducing a 'struct device dev' representing our own
device.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Andy Fleming <afleming@freescale.com>
diff --git a/drivers/net/gianfar_mii.c b/drivers/net/gianfar_mii.c
index 678f48c..38895b0 100644
--- a/drivers/net/gianfar_mii.c
+++ b/drivers/net/gianfar_mii.c
@@ -196,7 +196,7 @@
 
 	new_bus->irq = pdata->irq;
 
-	new_bus->dev = dev;
+	new_bus->parent = dev;
 	dev_set_drvdata(dev, new_bus);
 
 	/*