DMUB_READ_MODIFY_WRITE_SEQ__MAX
offload->reg_seq_count == DMUB_READ_MODIFY_WRITE_SEQ__MAX)
(offload->same_addr_count == (DMUB_READ_MODIFY_WRITE_SEQ__MAX - 1));
struct dmub_cmd_read_modify_write_sequence seq[DMUB_READ_MODIFY_WRITE_SEQ__MAX];