scsi: elx: libefc: SLI and FC PORT state machine interfaces

Add library interface definitions for:

 - SLI and FC port (aka n_port_id) registration, allocation and
   deallocation.

Link: https://lore.kernel.org/r/20210601235512.20104-12-jsmart2021@gmail.com


Reviewed-by: Daniel Wagner <dwagner@suse.de>
Co-developed-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: Ram Vegesna <ram.vegesna@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>