doc: media: visl: Add AV1 support

Add AV1 information in visl documentation.

Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/admin-guide/media/visl.rst

@@ -71,6 +71,7 @@ The following codecs are supported:
 - VP9
 - H.264
 - HEVC
+- AV1
 
 visl trace events
 -----------------
@@ -79,6 +80,7 @@ The trace events are defined on a per-codec basis, e.g.:
 .. code-block:: bash
 
         $ ls /sys/kernel/tracing/events/ | grep visl
+        visl_av1_controls
         visl_fwht_controls
         visl_h264_controls
         visl_hevc_controls