Make quantized max_pool2d error message more specific and less silly
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/26918
Test Plan: Imported from OSS
Differential Revision: D17609624
Pulled By: jamesr66a
fbshipit-source-id: 3bc900d5035e9311ab95e3d4a945e95062396afa
