[media] DocBook/v4l: Document the new system-wide version behavior

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml
index a7fd76d..c5ee398 100644
--- a/Documentation/DocBook/media/v4l/v4l2.xml
+++ b/Documentation/DocBook/media/v4l/v4l2.xml
@@ -128,6 +128,12 @@
 applications. -->
 
       <revision>
+	<revnumber>3.1</revnumber>
+	<date>2011-06-27</date>
+	<authorinitials>mcc, po</authorinitials>
+	<revremark>Documented that VIDIOC_QUERYCAP now returns a per-subsystem version instead of a per-driver one.</revremark>
+      </revision>
+      <revision>
 	<revnumber>2.6.39</revnumber>
 	<date>2011-03-01</date>
 	<authorinitials>mcc, po</authorinitials>