Installing AMDGPU drivers on Dell M7710 with AMD W5170m and running OpenCL without AMDGPU-PRO

I lost password for one of encrypted folders recently, but I remembered approximate "charset" of it and just wanted to try to bruteforce it. I have a W5170m GPU in my laptop, but since it is GCN 1.0 card - I had troubles adding OpenCL support necessary for any tool to bruteforce hashes on GPU. Below are steps to get it up and running.