scsi: lpfc: Annotate switch/case fall-through

This patch avoids that the compiler warns about missing fall-through
annotation when building with W=1.

Cc: James Smart <james.smart@broadcom.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_els.c

@@ -8775,7 +8775,7 @@ lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 				lpfc_nlp_put(ndlp);
 				return;
 			}
-
+			/* fall through */
 		default:
 			/* Try to recover from this error */
 			if (phba->sli_rev == LPFC_SLI_REV4)