Porting/llama.cpp
Finished
- additional optimizations for POWER9
- build: support ppc64le build for make and CMake
- ggml-impl.h: fix build on POWER9
- ggml-cpu-impl.h: do not redefine bool on POWER9
- Fix for issue #13170
- Implement GGML_CPU_ALL_VARIANTS for PowerPC
- ggml-cpu: add mxfp4 VSX intrinsics for Power9+ (ppc64le) hardware – 3-4x performance boost
- ggml-cpu: Don't pass -mpowerpc64 when -mcpu already implies it
