scsi: smartpqi: add smartpqi.txt

scsi: smartpqi: add smartpqi.txt

Orabug: 25144431

added Documentation/scsi/smartpqi.txt

[mkp: applied by hand]

Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 425b490b2aa745740ea3618e1cdcc2bc37c0d996)
Signed-off-by: Brian Maly <brian.maly@oracle.com>