TSS: ML command support

[toyoshim]

This command has been dropped from the official manual for a long time, but exists in the original TSS.

The spec-like information from the original source code follows.

compiler side:

                        case 'm':
                                if('l' == sort->peek()){        // multiple
                                        sort->get();
                                        if (!getOneParam(dt, 1, 0, 255, TSSC_ERR_MULTIPLE))
                                                goto error;
                                        data->put(0x93);
                                        data->put(dt);

driver side:

                                case 0x93:
                                        // multiple
                                        work->channel[i]->multiple = work->work[i].channelData[work->work[i].channelPos++];
                                        break;

[toyoshim]

aike fixed this issue!
#6