scsi: fnic: Add headers and definitions for FDLS

Add headers and definitions for FDLS (Fabric Discovery and Login Services).

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Co-developed-by: Gian Carlo Boffa <gcboffa@cisco.com>
Signed-off-by: Gian Carlo Boffa <gcboffa@cisco.com>
Co-developed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Signed-off-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Co-developed-by: Arun Easi <aeasi@cisco.com>
Signed-off-by: Arun Easi <aeasi@cisco.com>
Co-developed-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://lore.kernel.org/r/20241212020312.4786-3-kartilak@cisco.com


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