scsi: vpd pages are mandatory for SPC-2

VPD pages 0x0 and 0x83 are mandatory even for SPC-2, so we should be
lowering the restriction to avoid having to whitelist every SPC-2
compliant device.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>