Follow up to adaptive_max_pool2d() port (#19738)
Summary:
This is a follow up PR for #19409.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19738
Differential Revision: D15103231
Pulled By: ezyang
fbshipit-source-id: 11c9fec641b389906b8accd22504a683331fa6ec
