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

[Sam Elliott via llvm-commits]

lenary wrote:

@wangpc-pp yes that's right - I think AArch64 has a page-based hi/lo pair - but the representation here is using target-flags and hence is target-specific, so I think the overhead of generalising this check might be high. 

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