avformat: small cosmetics after 6512ff72

Signed-off-by: James Almer <jamrial@gmail.com>

libavformat/avformat.h

@@ -991,6 +991,8 @@ typedef struct AVStream {
      * String containing pairs of key and values describing recommended encoder configuration.
      * Pairs are separated by ','.
      * Keys are separated from values by '='.
+     *
+     * @deprecated unused
      */
     attribute_deprecated
     char *recommended_encoder_configuration;
@@ -1220,8 +1222,8 @@ attribute_deprecated
 AVRational av_stream_get_r_frame_rate(const AVStream *s);
 attribute_deprecated
 void       av_stream_set_r_frame_rate(AVStream *s, AVRational r);
-attribute_deprecated
 #if FF_API_LAVF_FFSERVER
+attribute_deprecated
 char* av_stream_get_recommended_encoder_configuration(const AVStream *s);
 attribute_deprecated
 void  av_stream_set_recommended_encoder_configuration(AVStream *s, char *configuration);