avcodec/chroma: map VLC_CODEC_VUYA to AV_PIX_FMT_VUYX

It is (at least) part of FFmpeg 6.1 and can be used as DXVA/QSV output.

modules/codec/avcodec/chroma.c

@@ -121,6 +121,10 @@ static const struct
     {VLC_CODEC_UYVY, AV_PIX_FMT_UYVY422,  COLOR_RANGE_UNDEF },
     {VLC_CODEC_YVYU, AV_PIX_FMT_YVYU422,  COLOR_RANGE_UNDEF },
 
+#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(57, 34, 100)
+    {VLC_CODEC_VUYA, AV_PIX_FMT_VUYX,     COLOR_RANGE_UNDEF },
+#endif
+
     /* Packed RGB formats */
     {VLC_CODEC_RGB233, AV_PIX_FMT_RGB8,  COLOR_RANGE_UNDEF },
     {VLC_CODEC_BGR233, AV_PIX_FMT_BGR8,  COLOR_RANGE_UNDEF },