scsi: lpfc: lpfc_sli: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.

Notice that, in this particular case, I replaced "Drop thru" and "Fall
Thru" with "fall through" annotations, which is what GCC is expecting to
find.

Also, in some cases a dash is added as a token in order to separate the
"fall through" annotation from the rest of the comment on the same line,
which is what GCC is expecting to find.

Addresses-Coverity-ID: 114979 ("Missing break in switch")
Addresses-Coverity-ID: 114980 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <[e-mail]>
Acked-by: Dick Kennedy <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/lpfc/lpfc_sli.c

···
 		cmnd = CMD_XMIT_SEQUENCE64_CR;
 		if (phba->link_flag & LS_LOOPBACK_MODE)
 			bf_set(wqe_xo, &wqe->xmit_sequence.wge_ctl, 1);
+		/* fall through */
 	case CMD_XMIT_SEQUENCE64_CR:
 		/* word3 iocb=io_tag32 wqe=reserved */
 		wqe->xmit_sequence.rsvd3 = 0;
···
 	case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
 		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 				"2537 Receive Frame Truncated!!\n");
+		/* fall through */
 	case FC_STATUS_RQ_SUCCESS:
 		spin_lock_irqsave(&phba->hbalock, iflags);
 		lpfc_sli4_rq_release(hrq, drq);
···
 	case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
 		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 				"6126 Receive Frame Truncated!!\n");
-		/* Drop thru */
+		/* fall through */
 	case FC_STATUS_RQ_SUCCESS:
 		spin_lock_irqsave(&phba->hbalock, iflags);
 		lpfc_sli4_rq_release(hrq, drq);
···
 				eq->entry_count);
 		if (eq->entry_count < 256)
 			return -EINVAL;
-		/* otherwise default to smallest count (drop through) */
+		/* fall through - otherwise default to smallest count */
 	case 256:
 		bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
 		       LPFC_EQ_CNT_256);
···
 			       LPFC_CQ_CNT_WORD7);
 			break;
 		}
-		/* Fall Thru */
+		/* fall through */
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 				"0361 Unsupported CQ count: "
···
 			status = -EINVAL;
 			goto out;
 		}
-		/* otherwise default to smallest count (drop through) */
+		/* fall through - otherwise default to smallest count */
 	case 256:
 		bf_set(lpfc_cq_context_count, &cq_create->u.request.context,
 		       LPFC_CQ_CNT_256);
···
 					       LPFC_CQ_CNT_WORD7);
 					break;
 				}
-				/* Fall Thru */
+				/* fall through */
 			default:
 				lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 						"3118 Bad CQ count. (%d)\n",
···
 					status = -EINVAL;
 					goto out;
 				}
-				/* otherwise default to smallest (drop thru) */
+				/* fall through - otherwise default to smallest */
 			case 256:
 				bf_set(lpfc_mbx_cq_create_set_cqe_cnt,
 				       &cq_set->u.request, LPFC_CQ_CNT_256);
···
 			status = -EINVAL;
 			goto out;
 		}
-		/* otherwise default to smallest count (drop through) */
+		/* fall through - otherwise default to smallest count */
 	case 16:
 		bf_set(lpfc_mq_context_ring_size,
 		       &mq_create_ext->u.request.context,
···
 				status = -EINVAL;
 				goto out;
 			}
-			/* otherwise default to smallest count (drop through) */
+			/* fall through - otherwise default to smallest count */
 		case 512:
 			bf_set(lpfc_rq_context_rqe_count,
 			       &rq_create->u.request.context,
···
 				status = -EINVAL;
 				goto out;
 			}
-			/* otherwise default to smallest count (drop through) */
+			/* fall through - otherwise default to smallest count */
 		case 512:
 			bf_set(lpfc_rq_context_rqe_count,
 			       &rq_create->u.request.context,