llama.cpp fork optimized for AMD GFX906 (Mi50, Mi60, Radeon VII, GCN HIP)

A developer released a llama.cpp fork with HIP optimizations targeting AMD GFX906-class GPUs including the Mi50, Mi60, Radeon VII, and GCN HIP cards. These cards have minimal support in the mainline llama.cpp codebase, leaving many AMD users without an optimized inference path.