scsi: scsi_transport_fc: Add comments to describe added 'rport' parameter

Note that there is no executable code altered by this patch.

Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-kbuild-all/[e-mail]/
Signed-off-by: Ewan D. Milne <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/scsi_transport_fc.c

···
 /**
  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
  * @shost:	Pointer to Scsi_Host bound to fc_host.
+ * @rport:	rport associated with the devloss work
  * @work:	Work to queue for execution.
  * @delay:	jiffies to delay the work queuing
  *
···
 /**
  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
  * @shost:	Pointer to Scsi_Host bound to fc_host.
+ * @rport:	rport associated with the devloss work
  */
 static void
 fc_flush_devloss(struct Scsi_Host *shost, struct fc_rport *rport)