Serialization for nn.quantized.functional modules (#24924)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/24924
Add load_from_state_dict and save_from_state_dict for quantized functional modules
ghstack-source-id: 89001576
Test Plan: buck test mode/dev caffe2/test:quantization -- 'test_scriptability_serialization\ \(test_quantization.ScriptabilityTest\)' --print-passing-details
Differential Revision: D16923651
fbshipit-source-id: eb1234be1941ccf268a2fc5b756540ab973f3ffb
