[llvm] [LLVM][AArch64] Relax SVE/SME codegen predicates. (PR #145322)

[Jonathan Thackray via llvm-commits]

https://github.com/jthackray approved this pull request.

LGTM, although I'm not an expert in this area. Just a couple of typos in the commit message: "meant some SME instructions where not available" and "seperate".

https://github.com/llvm/llvm-project/pull/145322