pytorch

41100d40 - Add PerChannelAffineQuantizer (#20764)

Add PerChannelAffineQuantizer (#20764) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/20764 att Reviewed By: dskhudia Differential Revision: D15367364 fbshipit-source-id: 1d3ebf356ceac73b0fa4493209839d1c66d4d5b3