VK_AMD_shader_ballot Support For RADV, Lets DOOM Use AMD-Optimized Code Path

Connor Abbott who has been working for Valve over the summer on the RADV Vulkan driver sent out one of his last patch series before going back to school: VK_AMD_shader_ballot for RADV. This extension paired with other work allows DOOM on Wine to run through an AMD-optimized Vulkan code path...