[llvm] [RISC-V] Fix incorrect epilogue_begin (PR #120623)

[Craig Topper via llvm-commits]

topperc wrote:

> > Can you split the interface change that affects every target into a separate from the RISCV specific change?
> 
> It is already separate. This PR has two commits, one which makes the interface change and the other which uses the revised interface to fix RISC-V specific issue.
> 
> Or are you suggesting making two PRs, one for the interface change and one for RISC-V specific fix?

Make a separate PR. The github web interface won't let you push a PR as two separate commits.

https://github.com/llvm/llvm-project/pull/120623