[llvm] [RISCV] Guard CFI emission code with MF.needsFrameMoves() (PR #136060)

[Sam Elliott via llvm-commits]

lenary wrote:

This unblocks scheduling changes, which is potentially useful, but it's a worry that this effectively makes codegen with and without debug/unwind info different, which we'd like to avoid.



https://github.com/llvm/llvm-project/pull/136060