Replace hardcoded values in IndexKernel.cu (#63372)
Summary:
This is a small change that helps to maintain Cruise pytorch fork, since we use a different hardcoded value.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63372
Reviewed By: mruberry
Differential Revision: D30396171
Pulled By: ejguan
fbshipit-source-id: cc0023f58b5922d3d98c7283495e6dc8d35049b6
