[clang] [X86] Change target of __builtin_ia32_cmp[p|s][s|d] from avx into sse/sse2 (PR #67410)

[Freddy Ye via cfe-commits]

FreddyLeaf wrote:

> No strong objections, but I think the documentation needs to be tweaked to better explain SSE vs AVX handling.

I have an idea to show two results for the `_mm_cmp_sd`, one's CPUID is SSE2, the other one's is AVX.

https://github.com/llvm/llvm-project/pull/67410