[Docs] Add header for files (#1181)

* [Docs] Add header for files

* change to OpenMMLab

* add headers for .cpp, .cu, .h, .cuh

* replace Open-MMLab with OpenMMLab

mmcv/ops/csrc/pytorch/roi_pool_cuda.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include "pytorch_cuda_helper.hpp"
 #include "roi_pool_cuda_kernel.cuh"
 

mmcv/ops/csrc/pytorch/sync_bn.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "pytorch_cpp_helper.hpp"
 
 #ifdef MMCV_WITH_CUDA

mmcv/ops/csrc/pytorch/sync_bn_cuda.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include "pytorch_cuda_helper.hpp"
 #include "sync_bn_cuda_kernel.cuh"
 

mmcv/ops/csrc/pytorch/tin_shift.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "pytorch_cpp_helper.hpp"
 
 #ifdef MMCV_WITH_CUDA

mmcv/ops/csrc/pytorch/tin_shift_cuda.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include "pytorch_cuda_helper.hpp"
 #include "tin_shift_cuda_kernel.cuh"
 

mmcv/ops/csrc/roi_align_cuda_kernel.cuh

+// Copyright (c) OpenMMLab. All rights reserved
 #ifndef ROI_ALIGN_CUDA_KERNEL_CUH
 #define ROI_ALIGN_CUDA_KERNEL_CUH
 

mmcv/ops/csrc/roi_pool_cuda_kernel.cuh

+// Copyright (c) OpenMMLab. All rights reserved
 #ifndef ROI_POOL_CUDA_KERNEL_CUH
 #define ROI_POOL_CUDA_KERNEL_CUH
 

mmcv/ops/csrc/sigmoid_focal_loss_cuda_kernel.cuh

+// Copyright (c) OpenMMLab. All rights reserved
 #ifndef SIGMOID_FOCAL_LOSS_CUDA_KERNEL_CUH
 #define SIGMOID_FOCAL_LOSS_CUDA_KERNEL_CUH
 

mmcv/ops/csrc/softmax_focal_loss_cuda_kernel.cuh

+// Copyright (c) OpenMMLab. All rights reserved
 #ifndef SOFTMAX_FOCAL_LOSS_CUDA_KERNEL_CUH
 #define SOFTMAX_FOCAL_LOSS_CUDA_KERNEL_CUH
 

mmcv/ops/csrc/sync_bn_cuda_kernel.cuh

+// Copyright (c) OpenMMLab. All rights reserved
 #ifndef SYNCBN_CUDA_KERNEL_CUH
 #define SYNCBN_CUDA_KERNEL_CUH
 

mmcv/ops/csrc/tensorrt/plugins/trt_corner_pool.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "trt_corner_pool.hpp"
 
 #include <assert.h>

mmcv/ops/csrc/tensorrt/plugins/trt_corner_pool_kernel.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include "common_cuda_helper.hpp"
 #include "trt_cuda_helper.cuh"
 #include "trt_plugin_helper.hpp"

mmcv/ops/csrc/tensorrt/plugins/trt_cuda_helper.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include <cublas_v2.h>
 
 #include "common_cuda_helper.hpp"

mmcv/ops/csrc/tensorrt/plugins/trt_cummaxmin.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "trt_cummaxmin.hpp"
 
 #include <assert.h>

mmcv/ops/csrc/tensorrt/plugins/trt_cummaxmin_kernel.cu

+// Copyright (c) OpenMMLab. All rights reserved
 
 #include "common_cuda_helper.hpp"
 #include "trt_cuda_helper.cuh"

mmcv/ops/csrc/tensorrt/plugins/trt_deform_conv.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "trt_deform_conv.hpp"
 
 #include <assert.h>

mmcv/ops/csrc/tensorrt/plugins/trt_deform_conv_kernel.cu

+// Copyright (c) OpenMMLab. All rights reserved
 #include <cuda_fp16.h>
 
 #include "common_cuda_helper.hpp"

mmcv/ops/csrc/tensorrt/plugins/trt_grid_sampler.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 #include "trt_grid_sampler.hpp"
 
 #include <assert.h>

mmcv/ops/csrc/tensorrt/plugins/trt_grid_sampler_kernel.cu

+// Copyright (c) OpenMMLab. All rights reserved
 // modified from
 // https://github.com/pytorch/pytorch/blob/ec683299ebabf297a3504c76248d37be830e4342/aten/src/ATen/native/cuda/GridSampler.cuh
 // and

mmcv/ops/csrc/tensorrt/plugins/trt_instance_norm.cpp

+// Copyright (c) OpenMMLab. All rights reserved
 // Modified from:
 // https://github.com/NVIDIA/TensorRT/blob/master/plugin/instanceNormalizationPlugin/instanceNormalizationPlugin.cpp