r600_engine_clock_entry_set_feedback_divider
void r600_engine_clock_entry_set_feedback_divider(struct radeon_device *rdev,
r600_engine_clock_entry_set_feedback_divider(rdev, 0, dividers.fb_div);
r600_engine_clock_entry_set_feedback_divider(rdev, step_index, fb_divider);