Make cuGetDeviceUuid optional

Turns out this was only added in CUDA 9.2. I thought it had been
around forever.

Reported by: https://trac.ffmpeg.org/ticket/7530

Author: philipl

ffnvcodec.pc.in

@@ -3,5 +3,5 @@ includedir=${prefix}/include
 
 Name: ffnvcodec
 Description: FFmpeg version of Nvidia Codec SDK headers
-Version: 8.2.15.5
+Version: 8.2.15.6
 Cflags: -I${includedir}

include/ffnvcodec/dynlink_loader.h

@@ -260,7 +260,7 @@ static inline int cuda_load_functions(CudaFunctions **functions, void *logctx)
     LOAD_SYMBOL(cuDeviceGetCount, tcuDeviceGetCount, "cuDeviceGetCount");
     LOAD_SYMBOL(cuDeviceGet, tcuDeviceGet, "cuDeviceGet");
     LOAD_SYMBOL(cuDeviceGetName, tcuDeviceGetName, "cuDeviceGetName");
-    LOAD_SYMBOL(cuDeviceGetUuid, tcuDeviceGetUuid, "cuDeviceGetUuid");
+    LOAD_SYMBOL_OPT(cuDeviceGetUuid, tcuDeviceGetUuid, "cuDeviceGetUuid");
     LOAD_SYMBOL(cuDeviceComputeCapability, tcuDeviceComputeCapability, "cuDeviceComputeCapability");
     LOAD_SYMBOL(cuCtxCreate, tcuCtxCreate_v2, "cuCtxCreate_v2");
     LOAD_SYMBOL(cuCtxSetLimit, tcuCtxSetLimit, "cuCtxSetLimit");