[llvm] [RISCV] Remove CalleeSavedInfo for Zcmp/save-restore-libcalls registers (PR #79535)

[Craig Topper via llvm-commits]

topperc wrote:

Could this patch affect Inter Procedural Register Allocation? I'm seeing a regression and I'm guess this could be related.

https://github.com/llvm/llvm-project/pull/79535