[clang] [compiler-rt] [llvm] [X86] Add AVX512BMM support for AMD Zen 6 (znver6) (PR #182556)

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Disservin wrote:

shouldn't this patch have added a flag `-mavx512bmm` to clang ? 
If I look at https://github.com/llvm/llvm-project/pull/179150 it seems there used to be a change to `clang/include/clang/Options/Options.td` gcc has such a flag for example..
cc @ganeshgit 

https://github.com/llvm/llvm-project/pull/182556