scsi: lpfc: Clean up hba max_lun_queue_depth checks

scsi: lpfc: Clean up hba max_lun_queue_depth checks

The current code does some odd +1 over maximum xri count checks and
requires that the lun_queue_count can't be bigger than maximum xri count
divided by 8. These items are bogus.

Clean the code up to cap lun_queue_count to maximum xri count.

Link: https://lore.kernel.org/r/20200128002312.16346-10-jsmart2021@gmail.com
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>