[mlir] [clang] [llvm] [AArch64][SME] Remove immediate argument restriction for svldr and svstr (PR #68565)

[Sander de Smalen via cfe-commits]

https://github.com/sdesmalen-arm approved this pull request.

Thanks for all the changes! LGTM with few little nits addressed.

https://github.com/llvm/llvm-project/pull/68565