Fix 'stable_diffusion_xl' (#1994)
Summary:
- Add missing return of 'get_module' for 'stable_diffusion_xl'.
- Fix 'args_tuple' with the correct positional args order.
cc msaroufim
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1994
Reviewed By: xuzhao9
Differential Revision: D50425771
Pulled By: msaroufim
fbshipit-source-id: ca0067247ac2287e94ff67a3c1801f26044670a7
