[llvm] [RISCV] Don't outline pcrel_lo when the function has a section prefix (PR #107943)

[Sam Elliott via llvm-commits]

https://github.com/lenary approved this pull request.

LGTM, but I worked with Jonathon on tracking down the issue, so another reviewer is probably required.

https://github.com/llvm/llvm-project/pull/107943