Patch perf regression for mmq kernels in ROCm#18442

jiachengjason wants to merge 2 commits intoggml-org:masterggml-org/llama.cpp:masterfrom

jiachengjason:fix/jiachengjason/rocm7.x_regressionjiachengjason/llama.cpp-rocm-mmq:fix/jiachengjason/rocm7.x_regressionCopy head branch name to clipboard