scsi: dc395x: Stop using the SCSI pointer

Remove the code that sets SCSI pointer members since there is no code in
this driver that reads these members.

Link: https://lore.kernel.org/r/20220218195117.25689-19-bvanassche@acm.org


Cc: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>