https://patchwork.freedesktop.org/series/37219/
The entire update should roll very soon into the official libdrm base when AMD dev Alex Deucher submits it to Dave Airlie managed Libdrm code base.
Something of big interest is AMD removing the limit on GPGPUs supported. This should be a big boon for OpenCL systems with multiple GPGPUs.
https://patchwork.freedesktop.org/patch/201099/
Once this goes live Blender should be able to recognize the OpenCL stack within Mesa/Libdrm and the number of GPGPUs without using the AMDGPU PRO Stack.