[llvm] [AArch64][GlobalISel] Adopt some Ld* patterns to reduce codegen regressions (PR #135492)

[Amara Emerson via llvm-commits]

aemerson wrote:

I haven't looked at this deeply, but would it be possible to fix the SDAG patterns instead of adding new GISel specific ones?

https://github.com/llvm/llvm-project/pull/135492