fix broken header in NV path

Change-Id: Ia3aff2a89d9ba49547f51ce03a3304dfab58ba25

include/hip/nvcc_detail/hip_runtime_api.h

@@ -948,4 +948,6 @@ inline static hipChannelFormatDesc hipCreateChannelDesc()
 {
 		return cudaCreateChannelDesc<T>();
 }
-#endif
+#endif //__CUDACC__
+
+#endif //HIP_INCLUDE_HIP_NVCC_DETAIL_HIP_RUNTIME_API_H