[llvm] [AArch64] Fix predicates for SME2p2. (PR #145315)

[Paul Walker via llvm-commits]

paulwalker-arm wrote:

Hi @sdesmalen-arm, I'm currently working on a PR to fix all the predicates where SVE and SME are used together.  Do you mind dropping this PR and leaving it with me?

https://github.com/llvm/llvm-project/pull/145315