minor speed bump for MTP with Qwen3.6-27B-MTP Q6_K_XL

In three linesPersonal benchmark on MacBook M5 Max: Qwen 3.6-27B-UD-Q6_K_XL with MTP reaches 22.3 tokens/s vs 19 tokens/s without MTP via llama.cpp. Modest improvement (17%) compared to reported gains elsewhere.

Summary generated by Claude — human-verified