This is an experimental reverse engineered library for Skyrim VR (ported from CommonLibSSE). There are two main branches (VR) which is based on po3's using ifdefs, and NG which is an updated NG build.
To be consistent with other mods, can you make openvr be in the directory extern/openvr? I think that's the standard structure for external dependencies in c++.
OpenVR submodule: https://github.com/ValveSoftware/openvr