Fixed include file header guard. (#36329)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36329
The same header guard was used in two different header files (not sure if this was intentional.)
Test Plan: CI Tests
Reviewed By: jspark1105
Differential Revision: D20946512
fbshipit-source-id: dd0190943a8c90059d480f15c05f3bfcce956acd
