compat/cuda: update cuvid/nvdec headers to Video Codec SDK 8.0.14

This raises the required minimum NVIDIA display driver versions:
NVIDIA Linux display driver 378.13 or newer
NVIDIA Windows display driver 378.66 or newer

compat/cuda/dynlink_cuda.h

@@ -43,6 +43,7 @@
 typedef int CUdevice;
 typedef void* CUarray;
 typedef void* CUcontext;
+typedef void* CUstream;
 #if defined(__x86_64) || defined(AMD64) || defined(_M_AMD64)
 typedef unsigned long long CUdeviceptr;
 #else

compat/cuda/dynlink_loader.h

@@ -125,6 +125,7 @@ typedef struct CudaFunctions CudaFunctions;
 #endif
 
 typedef struct CuvidFunctions {
+    tcuvidGetDecoderCaps *cuvidGetDecoderCaps;
     tcuvidCreateDecoder *cuvidCreateDecoder;
     tcuvidDestroyDecoder *cuvidDestroyDecoder;
     tcuvidDecodePicture *cuvidDecodePicture;
@@ -201,6 +202,7 @@ static inline int cuvid_load_functions(CuvidFunctions **functions)
 {
     GENERIC_LOAD_FUNC_PREAMBLE(CuvidFunctions, cuvid, NVCUVID_LIBNAME);
 
+    LOAD_SYMBOL(cuvidGetDecoderCaps, "cuvidGetDecoderCaps");
     LOAD_SYMBOL(cuvidCreateDecoder, "cuvidCreateDecoder");
     LOAD_SYMBOL(cuvidDestroyDecoder, "cuvidDestroyDecoder");
     LOAD_SYMBOL(cuvidDecodePicture, "cuvidDecodePicture");