[lld] [llvm] Reapply "[RISCV] Support RISCV Atomics ABI attributes (#84597)" (PR #90266)

[Paul Kirth via llvm-commits]

ilovepi wrote:

@MaskRay does the current implementation address your remaining concerns? If so, then I'll go ahead and land this to unblock the TSO work.

https://github.com/llvm/llvm-project/pull/90266