scsi: lpfc: Fix loop mode target discovery

The driver does not discover targets when in loop mode.

The NLP type is correctly getting set when a fabric connection is
detected but, not for loop. The unknown NLP type means that the driver
does not issue a PRLI when in loop topology. Thus target discovery
fails.

Fix by checking the topology during discovery.  If it is loop, set the
NLP FC4 type to FCP.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_nportdisc.c

@@ -1724,6 +1724,9 @@ lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
 				lpfc_nvme_update_localport(vport);
 			}
 
+		} else if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
+			ndlp->nlp_fc4_type |= NLP_FC4_FCP;
+
 		} else if (ndlp->nlp_fc4_type == 0) {
 			rc = lpfc_ns_cmd(vport, SLI_CTNS_GFT_ID,
 					 0, ndlp->nlp_DID);