mvs_slot_complete
mvs_slot_complete(mvi, slot_no, 1);
mvs_slot_complete(mvi, slot_idx, 1);
mvs_slot_complete(mvi, rx_desc, 0);
mvs_slot_complete(mvi, rx_desc, 0);
int mvs_slot_complete(struct mvs_info *mvi, u32 rx_desc, u32 flags);