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

- New notification system for i2o_driver's which get now a notification if a
  I2O controller is added or removed.

- SCSI-OSM now uses notifications to create the Scsi_Host to the
  corresponding I2O controller.

- Use __scsi_add_device to preset hostdata.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>