scsi: lpfc: vmid: Implement CT commands for appid

Implement CT commands for registering and deregistering the appid for the
application. Also, a small change in decrementing the ndlp ref counter has
been added.

Link: https://lore.kernel.org/r/20210608043556.274139-10-muneendra.kumar@broadcom.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Gaurav Srivastava <gaurav.srivastava@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>