[libc-commits] [libc] Remove wrong float-128 extension for CLang (PR #75909)

[Guillaume Chatelet via libc-commits]

gchatelet wrote:

It seems to me that it does support float128 for x86_64.
https://godbolt.org/z/hqcfnnxc8

Although there is indeed a mistake, the condition should be `>= 600` and not `>= 500`.

https://github.com/llvm/llvm-project/pull/75909