set_engine_pll_state
clock.set_engine_pll_state(VIA_STATE_ON);
clock->set_engine_pll_state = dummy_set_pll_state;
clock->set_engine_pll_state = set_engine_pll_state;
clock->set_engine_pll_state = set_engine_pll_state;
void (*set_engine_pll_state)(u8 state);