[media] DocBook: fix incorrect or missing links

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml
index aeaed59..81082fb 100644
--- a/Documentation/DocBook/media/dvb/frontend.xml
+++ b/Documentation/DocBook/media/dvb/frontend.xml
@@ -66,7 +66,7 @@
 
 <para>The usage of this field is deprecated, as it doesn't report all supported standards, and
 will provide an incomplete information for frontends that support multiple delivery systems.
-Please use <link linkend="DTV_ENUM_DELSYS">DTV_ENUM_DELSYS</link> instead.</para>
+Please use <link linkend="DTV-ENUM-DELSYS">DTV_ENUM_DELSYS</link> instead.</para>
 </section>
 
 <section id="fe-caps-t">