scsi: scsi_transport_fc: Add kernel-doc for function return

Add function return value to prevent a kernel-doc warning:

scsi_transport_fc.h:780: warning: No description found for return value of 'fc_remote_port_chkready'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20240408025425.18778-8-rdunlap@infradead.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/scsi/scsi_transport_fc.h

@@ -770,10 +770,9 @@ struct fc_function_template {
 /**
  * fc_remote_port_chkready - called to validate the remote port state
  *   prior to initiating io to the port.
- *
- * Returns a scsi result code that can be returned by the LLDD.
- *
  * @rport:	remote port to be checked
+ *
+ * Returns: a scsi result code that can be returned by the LLDD.
  **/
 static inline int
 fc_remote_port_chkready(struct fc_rport *rport)