pytorch

157fcfc0 - Add `quantize_linear_per_channel` (#20765)

Add `quantize_linear_per_channel` (#20765) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/20765 att Reviewed By: dskhudia Differential Revision: D15435455 fbshipit-source-id: 77770044411ce8ee02d26d63eb7e79cd10db103e