scsi: lpfc: Fix oops when NVME Target is discovered in a nonNVME environment

lpfc oops when it discovers a NVME target but is configured for SCSI
only operation. Oops is in lpfc_nvme_register_port+0x33/0x300.

The localport is not valid so it should not have been referenced.

Added validity check for localport
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_nvme.c

@@ -2296,6 +2296,9 @@ lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 			 ndlp->nlp_DID, ndlp->nlp_type);
 
 	localport = vport->localport;
+	if (!localport)
+		return 0;
+
 	lport = (struct lpfc_nvme_lport *)localport->private;
 
 	/* NVME rports are not preserved across devloss.