ieee1394: fix oops on "modprobe -r ohci1394" after network class_device conversion

The networking subsystem has been converted from class_device to device
but ieee1394 hasn't.  This results in a 100% reproducible NULL pointer
dereference if the ohci1394 driver module is unloaded while the eth1394
module is still loaded.
http://lkml.org/lkml/2006/11/16/147
http://lkml.org/lkml/2007/3/14/4

This is a regression in 2.6.21-rc1.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Ismail Dönmez <ismail@pardus.org.tr>

drivers/ieee1394/eth1394.c

@@ -584,7 +584,10 @@ static void ether1394_add_host (struct hpsb_host *host)
         }
 
 	SET_MODULE_OWNER(dev);
+#if 0
+	/* FIXME - Is this the correct parent device anyway? */
 	SET_NETDEV_DEV(dev, &host->device);
+#endif
 
 	priv = netdev_priv(dev);