V4L/DVB (13162): Docbook/dvb: add missing specs for FE_DISHNETWORK_SEND_LEGACY_CMD ioctl

While this ioctl should not be used, and is a good canditate for
Documentation/feature-removal-schedule.txt, while it is on kernel,
it needs to be documented.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/Documentation/DocBook/dvb/dvbapi.xml b/Documentation/DocBook/dvb/dvbapi.xml
index fc1a237..63c528f 100644
--- a/Documentation/DocBook/dvb/dvbapi.xml
+++ b/Documentation/DocBook/dvb/dvbapi.xml
@@ -34,7 +34,7 @@
 	<date>2009-10-25</date>
 	<authorinitials>mcc</authorinitials>
 	<revremark>
-		documents FE_SET_FRONTEND_TUNE_MODE ioctl
+		documents FE_SET_FRONTEND_TUNE_MODE and FE_DISHETWORK_SEND_LEGACY_CMD ioctls.
 	</revremark>
 </revision>
 <revision>