FSM_EVENT_MD_HS2_EXIT
int ret = t7xx_fsm_append_event(ctl, FSM_EVENT_MD_HS2_EXIT, NULL, 0);
t7xx_fsm_clr_event(ctl, FSM_EVENT_MD_HS2_EXIT);
t7xx_core_hk_handler(md, &md->core_md, ctl, FSM_EVENT_MD_HS2, FSM_EVENT_MD_HS2_EXIT);
t7xx_fsm_append_event(ctl, FSM_EVENT_MD_HS2_EXIT, NULL, 0);