RADV Vulkan vs. RadeonSI OpenGL Performance With Linux 4.13 + Mesa 17.3-dev

Mad Max is largely faster with OpenGL over Vulkan in the tested games.

Though Vulkan got luck in the stronghold scene where it delivered slightly higher frame-rates with Vulkan on the RX 580 and R9 Fury.

But the rest of the time, the OpenGL RadeonSI performance was better for this first Feral Linux game ported to Vulkan.