si4713_set_power_state
rval = si4713_set_power_state(sdev, POWER_ON);
rval = si4713_set_power_state(sdev, POWER_OFF);
ret = si4713_set_power_state(sdev, POWER_DOWN);
ret = si4713_set_power_state(sdev, POWER_UP);
si4713_set_power_state(sdev, POWER_DOWN);