scsi: FlashPoint: Use standard SCSI definitions

No point in having the driver providing its own definitions.

Link: https://lore.kernel.org/r/20210427083046.31620-35-hare@suse.deSigned-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>