[llvm] [X86] Consistently use f128 libcalls (PR #142386)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> > Which part do you have in mind? That the f128 libcalls also get used on x86-32?
> 
> Yes - does this match gcc behaviour btw?

Seems [libquadmath](https://gcc.gnu.org/onlinedocs/libquadmath/Math-Library-Routines.html) uses `q` suffix. Why we use `f128` here?

https://github.com/llvm/llvm-project/pull/142386