[clang] AArch64 Tablegen Update (PR #179692)

[Jonathan Thackray via cfe-commits]

https://github.com/jthackray commented:

Thanks. I think this is an improvement overall. My only concern is that it is sufficiently tested and doesn't cause any regressions. Is running `clang-check` enough? I can't see anything obviously wrong with your changes, but I'll leave it for others to approve.

https://github.com/llvm/llvm-project/pull/179692