codec_desc: add SMVJPEG flags

Same flags as MJPEG, as it's essentially the same codec.

libavcodec/codec_desc.c

@@ -1519,6 +1519,7 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .id        = AV_CODEC_ID_SMVJPEG,
         .type      = AVMEDIA_TYPE_VIDEO,
         .name      = "smvjpeg",
+        .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
         .long_name = NULL_IF_CONFIG_SMALL("Sigmatel Motion Video"),
     },
     {