scsi: smartpqi: correct bdma hw bug

scsi: smartpqi: correct bdma hw bug

Orabug: 26191021, 26447813

add workaround for BDMA hardware bug that can cause
hw to read up to 12 SGL elements (192 bytes) beyond the
last element in the list. This fix avoids IOMMU violations

Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit e1d213bdc3e359c6c5da8ebbc5b2e87b376e8777)
Signed-off-by: Brian Maly <brian.maly@oracle.com>