Add /* FALLTHROUGH */

Found by:       FlexeLint

sys/cam/cam_periph.c

@@ -214,10 +214,13 @@ failure:
 		TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
 		splx(s);
 		xpt_remove_periph(periph);
+		/* FALLTHROUGH */
 	case 2:
 		xpt_free_path(periph->path);
+		/* FALLTHROUGH */
 	case 1:
 		free(periph, M_DEVBUF);
+		/* FALLTHROUGH */
 	case 0:
 		/* No cleanup to perform. */
 		break;

sys/nfsserver/nfs_syscalls.c

@@ -457,6 +457,7 @@ nfssvc_nfsd(struct thread *td)
 			nfsrvstats.srvrpccnt[nd->nd_procnum]++;
 			nfsrv_updatecache(nd, TRUE, mreq);
 			nd->nd_mrep = NULL;
+			/* FALLTHROUGH */
 		    case RC_REPLY:
 			siz = m_length(mreq, NULL);
 			if (siz <= 0 || siz > NFS_MAXPACKET) {