[llvm] Aarcht64 add waw sme clustering (PR #212603)

[Tomer Shafir via llvm-commits]

tomershafir wrote:

@wangpc-pp I did consider adding support for custom SDep to TabelGen macro-fusion, if you have a real user that would be good, as AArch64 still uses C++.

https://github.com/llvm/llvm-project/pull/212603