[llvm] [RISCV][Xqccmp] Correctly Parse/Disassemble pushfp (PR #133188)

[Sam Elliott via llvm-commits]

lenary wrote:

> > I templated `parseReglist` because the function seemed too long to copy/paste, but I avoided doing the same for most of the other methods - maybe I should have though? I'm not sure, feedback appreciated.
> > I may need a declaration somewhere that the `parseRegList` template instantiations actually (need to) exist.
> 
> Can we have an untemplated `parseRegList` that takes the flag as an argument and make the template function call the untemplate function with the template parameter passed as an argument? That will prevent the function from being duplicated in the binary.

Sure, I guess the size savings of this are better than any savings from `if constexpr`

https://github.com/llvm/llvm-project/pull/133188