radv: add RADV_DEBUG=splitfma and use for Proton SotTR
The game seems to expect fma to be unfused. Fixes depth-prepass artifacts.
I haven't tested the D3D12 version, but I think it doesn't work and needs sparse depth/stencil images.
The game seems to expect fma to be unfused. Fixes depth-prepass artifacts.
I haven't tested the D3D12 version, but I think it doesn't work and needs sparse depth/stencil images.