Quantized conv avoid functional usage (#22733)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22733
This refactor changes the conv module to avoid the usage of the functional ops.
Reviewed By: jerryzh168
Differential Revision: D15835572
fbshipit-source-id: f2294cd708fbe8372eb3a15cc60d83777d4f7029
