ggml : remove bit shuffling #2232

Job	Run time
ubuntu-latest-cmake	56s
ubuntu-latest-cmake-sanitizer (ADDRESS, Debug)	32s
ubuntu-latest-cmake-sanitizer (ADDRESS, Release)	56s
ubuntu-latest-cmake-sanitizer (THREAD, Debug)	32s
ubuntu-latest-cmake-sanitizer (THREAD, Release)	49s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Debug)	42s
ubuntu-latest-cmake-sanitizer (UNDEFINED, Release)	1m 17s
macOS-latest-make	56s
macOS-latest-cmake	1m 7s
ubuntu-focal-make	46s
windows-latest-cmake (avx2)	1m 20s
windows-latest-cmake (avx, -DLLAMA_AVX2=OFF)	2m 10s
windows-latest-cmake (avx512, -DLLAMA_AVX512=ON -DBUILD_SHARED_LIBS=ON)	1m 59s
windows-latest-cmake (clblast, -DLLAMA_CLBLAST=ON -DCMAKE_PREFIX_PATH="$env:RUNNER_TEMP/clblast")	4m 21s
windows-latest-cmake (openblas, -DLLAMA_OPENBLAS=ON -DBLAS_LIBRARIES="/LIBPATH:$env:RUNNER_TEMP/o...	2m 52s
windows-latest-cmake-cublas (12.1.0, cublas)	29m 32s
windows-latest-cmake-cublas (11.7.1, cublas)	27m 41s
release	0s
	1h 18m 28s

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