lavc: add mapping VUYA<->AV_PIX_FMT_VUYX

should allow FF codecs with VUYX supported without conversion

Author: MartinPulec

src/libavcodec/utils.c

@@ -48,6 +48,7 @@ static const struct uv_to_av_pixfmt uv_to_av_pixfmts[] = {
         {YUYV,AV_PIX_FMT_YUYV422},
 #if VUYX_PRESENT
         {VUYA, AV_PIX_FMT_VUYA},
+        {VUYA, AV_PIX_FMT_VUYX},
 #endif
         //R10k,
         //v210,