[llvm] [AArch64][ISel] Add support for v8.4a RCpc `ldapur`/`stlur` (PR #67879)

[Antonio Frighetto via llvm-commits]

antoniofrighetto wrote:

Not sure about the origin of that addition, though it seems this is no longer required when deciding to leverage unscaled operations (as it hinders their emission). We might introduce a more granular check (as mentioned at the beginning), but this does not look necessary either.

https://github.com/llvm/llvm-project/pull/67879