GitLab

Summary:
Pull Request resolved: https://github.com/facebookresearch/d2go/pull/338

Now we should've separated all the `prepare_for_quant` for eager and FX mode, we can remove this branch.

Reviewed By: jerryzh168

Differential Revision: D37865628

fbshipit-source-id: cd8f3aa7c90201f44bcfdbd65eb2edf5eded0e0c