avfilter/af_atempo: add support for unknown channel layouts

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Marton Balint <cus@passwd.hu>

libavfilter/af_atempo.c

@@ -1014,7 +1014,7 @@ static int query_formats(AVFilterContext *ctx)
     };
     int ret;
 
-    layouts = ff_all_channel_layouts();
+    layouts = ff_all_channel_counts();
     if (!layouts) {
         return AVERROR(ENOMEM);
     }