[compiler-rt] [RISCV][compiler-rt] Asm funcs should be hidden (PR #226633)

[Craig Topper via llvm-commits]

topperc wrote:

Should we be using the DEFINE_COMPILERRT_FUNCTION and/or DEFINE_COMPILERRT_PRIVATE_FUNCTION macros from compiler-rt/lib/builtins/assembly.h?

https://github.com/llvm/llvm-project/pull/226633