lavu/hwcontext_vaapi: add vaapi_format_map support for x2rgb10

Signed-off-by: Fei Wang <fei.w.wang@intel.com>

libavutil/hwcontext_vaapi.c

@@ -136,6 +136,9 @@ static const VAAPIFormatDescriptor vaapi_format_map[] = {
 #endif
     MAP(ARGB, RGB32,   ARGB, 0),
     MAP(XRGB, RGB32,   0RGB, 0),
+#ifdef VA_FOURCC_X2R10G10B10
+    MAP(X2R10G10B10, RGB32_10, X2RGB10, 0),
+#endif
 };
 #undef MAP