qcacld-3.0: Add comment between cases in switch statement

Add /* fallthrough */ comment in sme_qos_add_ts_success_fnp
as per linux checkpatch script in case of reason
SME_QOS_REASON_REQ_SUCCESS of flow request.

Change-Id: I6285ccdc74e5c19fb9bbb8a1b9e0dec5e54edc6e
CRs-Fixed: 2233179

core/sme/src/qos/sme_qos.c

@@ -7203,6 +7203,7 @@ static QDF_STATUS sme_qos_add_ts_success_fnp(tpAniSirGlobal mac_ctx,
 	case SME_QOS_REASON_REQ_SUCCESS:
 		hdd_status = SME_QOS_STATUS_SETUP_MODIFIED_IND;
 		inform_hdd = true;
+	/* fallthrough */
 	default:
 		delete_entry = false;
 		break;