Hikey 970 support for OPENCL / Mali G72 GPU


HI, I am trying to run a benchmark of gpu based mobilenet on tvm/nnvm. The target device is Hikey 970 with Shunya based Ubuntu 16.04.
I get an error that OPENCL fails:
Check failed: context != nullptr No OpenCL device

I made sure ocl-icd-opencl-dev is Installed, and clinfo command does not identify anything.

Next , I tried verifying that MALI G72 drivers I installed - but could not find how to check or where to get them from. Any idea on how to proceed?