scsi: mpt3sas: Add missing kerneldoc parameter descriptions

Add missing kerneldoc parameter descriptions to _scsih_set_debug_level().

Signed-off-by: Deming Wang <wangdeming@inspur.com>
Link: https://lore.kernel.org/r/20240513115956.1576-1-wangdeming@inspur.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>