[compiler-rt] [X86][compiler-rt] Split CPU names even they have the same subtype (PR #118237)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

`llvm/lib/TargetParser/Host.cpp` needs to be updated as well and is probably what is causing the linked issue.

As a side note, can I get some reviews on my PRs to test/merge this infra between compiler-rt and LLVM?
1. #97861
2. #97856
3. #97872 (probably not ready for review yet).
4. #101927

https://github.com/llvm/llvm-project/pull/118237