IB/nes: Suppress gcc 7 fall-through complaints

Avoid that gcc 7 reports the following warning when building with W=1:

warning: this statement may fall through [-Wimplicit-fallthrough=]
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Faisal Latif <faisal.latif@intel.com>
Acked-by: Faisal Latif <fasial.latif@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/nes/nes_cm.c

@@ -1768,6 +1768,7 @@ static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
 	case NES_CM_STATE_FIN_WAIT1:
 	case NES_CM_STATE_LAST_ACK:
 		cm_node->cm_id->rem_ref(cm_node->cm_id);
+		/* fall through */
 	case NES_CM_STATE_TIME_WAIT:
 		cm_node->state = NES_CM_STATE_CLOSED;
 		rem_ref_cm_node(cm_node->cm_core, cm_node);

drivers/infiniband/hw/nes/nes_hw.c

@@ -3632,7 +3632,7 @@ static void nes_process_iwarp_aeqe(struct nes_device *nesdev,
 				aeq_info |= NES_AEQE_AEID_RDMAP_ROE_UNEXPECTED_OPCODE;
 				aeqe->aeqe_words[NES_AEQE_MISC_IDX] = cpu_to_le32(aeq_info);
 			}
-
+			/* fall through */
 		case NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE:
 		case NES_AEQE_AEID_LLP_TOO_MANY_RETRIES:
 		case NES_AEQE_AEID_DDP_UBE_INVALID_MSN_NO_BUFFER_AVAILABLE: