Change PYNQ board frequency with current VTA version?

Is it still possible to change the frequency for PYNQ board to use its 100, 142, 167 and 200MHz clocks? The VTA Installation Guide mentions this but the current version of the vta_config.json file does not include a HW_FREQ field or a HW_CLK_TARGET field.

Has this feature been removed or still available through another method?

You can find it in tvm\3rdparty\vta-hw\config\pkg_config.py