radv: add experimental support for AMD BC-250 board

AMD BC-250 is a mining board based on an AMD APU with an integrated GPU
that kernel recognizes as Cyan Skillfish.

It is basically RDNA1/GFX10, but with added hardware ray tracing
support. LLVM calls it GFX1013, see
https://llvm.org/docs/AMDGPU/AMDGPUAsmGFX1013.html

Support for this GPU hasn't been extensively tested. Some games are
known to work, some non-trivial ray query compute and ray tracing
pipeline rendering works too. Q2RTX works.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33116>

src/amd/compiler/aco_instruction_selection.cpp

@@ -5910,7 +5910,7 @@ visit_bvh64_intersect_ray_amd(isel_context* ctx, nir_intrinsic_instr* instr)
       node, tmax, origin, dir, inv_dir,
    };
 
-   if (bld.program->gfx_level == GFX10_3) {
+   if (bld.program->gfx_level == GFX10_3 || bld.program->family == CHIP_GFX1013) {
       std::vector<Temp> scalar_args;
       for (Temp tmp : args) {
          for (unsigned i = 0; i < tmp.size(); i++)