These files are copied from CUDA Toolkit Distribution and redistributed under the following license:

https://docs.nvidia.com/cuda/archive/9.2/eula/#nvidia-cuda-toolkit-license-agreement

For CUDA 11.2+, we enable CUDA Enhanced Compatibility by hosting the fp16 headers from the latest
CUDA Toolkit release and place them in the ``cuda-11`` folder.

Currenly, the headers in ``cuda-11`` are from CTK 11.6.
