[llvm] [NFC][AArch64] Adjust predicate names to be more consistent (PR #123172)

[Jonathan Thackray via llvm-commits]

jthackray wrote:

> We should probably do the same for `HasSVEorSME`, otherwise looks good.

Thanks, missed that one. Will amend.

https://github.com/llvm/llvm-project/pull/123172