Fix avx-512 detection logic for jit fuser with MSVC 2019 (#33403)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/33401.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33403
Differential Revision: D19949812
Pulled By: soumith
fbshipit-source-id: 00dc3c99b5ba1c13394d5d38bcb148720434b0a3
