nvenc: Include config.h before checking for D3D11 support

Reviewed-by: Timo Rothenpieler <timo@rothenpieler.org>

libavcodec/nvenc.h

@@ -19,6 +19,8 @@
 #ifndef AVCODEC_NVENC_H
 #define AVCODEC_NVENC_H
 
+#include "config.h"
+
 #if CONFIG_D3D11VA
 #define COBJMACROS
 #include "libavutil/hwcontext_d3d11va.h"
@@ -28,8 +30,6 @@ typedef void ID3D11Device;
 
 #include "compat/nvenc/nvEncodeAPI.h"
 
-#include "config.h"
-
 #include "compat/cuda/dynlink_loader.h"
 #include "libavutil/fifo.h"
 #include "libavutil/opt.h"