hotplug: more fixes for scsi disk hotplug. Changes: - create common scsi_hot_add function for adding a scsi disk to a adapter. - Add sanity checks. You can't drive_add disks to the VGA any more. - Ignore the unit value calculated by drive_init, add a comment explaining why. Review the patch to find the details ;) Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>