macb: Call phy_disconnect on removing

Call phy_disconnect() on remove routine.  Otherwise the phy timer
causes a kernel crash when unloading.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 1d210ed..10fcea5 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -1257,6 +1257,8 @@
 
 	if (dev) {
 		bp = netdev_priv(dev);
+		if (bp->phy_dev)
+			phy_disconnect(bp->phy_dev);
 		mdiobus_unregister(&bp->mii_bus);
 		kfree(bp->mii_bus.irq);
 		unregister_netdev(dev);