phylib: two dynamic mii_bus allocation fallout fixes

1. arch/powerpc/platforms/pasemi/gpio_mdio.c also needs to be
converted over to mdiobus_{alloc,free}().

2. drivers/net/phy/fixed.c used to embed a struct mii_bus into its
struct fixed_mdio_bus and then use container_of() to go from the
former to the latter. Since mii bus structures are no longer
embedded, we need to do something like use the mii bus private
pointer to go from mii_bus to fixed_mdio_bus instead.

Signed-off-by: Lennert Buytenhek <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

arch/powerpc/platforms/pasemi/gpio_mdio.c

···
 	if (!priv)
 		goto out;
 
-	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+	new_bus = mdiobus_alloc();
 
 	if (!new_bus)
 		goto out_free_priv;
···
 
 	kfree(bus->priv);
 	bus->priv = NULL;
-	kfree(bus);
+	mdiobus_free(bus);
 
 	return 0;
 }

drivers/net/phy/fixed.c

···
 
 static int fixed_mdio_read(struct mii_bus *bus, int phy_id, int reg_num)
 {
-	struct fixed_mdio_bus *fmb = container_of(bus, struct fixed_mdio_bus,
-						  mii_bus);
+	struct fixed_mdio_bus *fmb = bus->priv;
 	struct fixed_phy *fp;
 
 	if (reg_num >= MII_REGS_NUM)
···
 
 	snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "0");
 	fmb->mii_bus->name = "Fixed MDIO Bus";
+	fmb->mii_bus->priv = fmb;
 	fmb->mii_bus->parent = &pdev->dev;
 	fmb->mii_bus->read = &fixed_mdio_read;
 	fmb->mii_bus->write = &fixed_mdio_write;