X86JITInfo: [x86] Rework r206240, X86CompilationCallback_SSE() should be called for SSE-enabled code generator, even if LLVM is not built with -msse.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206261 91177308-0d34-0410-b5e6-96231b3b80d8