@Ghostplant links are 404

[taichichuan]

It seems as all of the @ghostplant links are now 404. Is there a guide or set of steps called out somewhere for supporting the GFX902? This is the graphics on the latest Ryzen 4700U APUs. So, it's not like AMD isn't continuing with the the Vega GPUs. Any, pointers would be appreciated and if I can figure it out, I'll put together a detailed document on the steps.