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

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -302,8 +302,8 @@ struct _scsi_io_transfer {
 
 /**
  * _scsih_set_debug_level - global setting of ioc->logging_level.
- * @val: ?
- * @kp: ?
+ * @val: value of the parameter to be set
+ * @kp: pointer to kernel_param structure
  *
  * Note: The logging levels are defined in mpt3sas_debug.h.
  */