From: Markus Lidel <Markus.Lidel@shadowconnect.com>

- Add a new function __scsi_add_device, which has an additional parameter
  compared to scsi_add_device.  This parameter is used to preset the hostdata
  pointer.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>