[media] DocBook media: fix validation error

<tgroup> doesn't understand the 'border' attribute.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/v4l/pixfmt-srggb10p.xml

@@ -38,7 +38,7 @@
 	<title>Byte Order.</title>
 	<para>Each cell is one byte.
 	  <informaltable frame="topbot" colsep="1" rowsep="1">
-	    <tgroup cols="5" align="center" border="1">
+	    <tgroup cols="5" align="center">
 	      <colspec align="left" colwidth="2*" />
 	      <tbody valign="top">
 		<row>