[media] DocBook: Fix arguments on some ioctl documentation

Due to a cut-and-paste error, the argument is missing or wrong
on 3 ioctl documentation. Fix them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/dvb/fe-diseqc-send-burst.xml

@@ -36,7 +36,10 @@
 	</listitem>
       </varlistentry>
       <varlistentry>
-	<term><parameter>pointer to &fe-sec-mini-cmd;</parameter></term>
+	<term><parameter>tone</parameter></term>
+	<listitem>
+	  <para>pointer to &fe-sec-mini-cmd;</para>
+	</listitem>
       </varlistentry>
     </variablelist>
   </refsect1>

Documentation/DocBook/media/dvb/fe-set-tone.xml

@@ -36,7 +36,10 @@
 	</listitem>
       </varlistentry>
       <varlistentry>
-	<term><parameter>pointer to &fe-sec-tone-mode;</parameter></term>
+	<term><parameter>tone</parameter></term>
+	<listitem>
+	  <para>pointer to &fe-sec-tone-mode;</para>
+	</listitem>
       </varlistentry>
     </variablelist>
   </refsect1>

Documentation/DocBook/media/dvb/fe-set-voltage.xml

@@ -36,7 +36,10 @@
 	</listitem>
       </varlistentry>
       <varlistentry>
-	<term><parameter>pointer to &fe-sec-voltage;</parameter></term>
+	<term><parameter>voltage</parameter></term>
+	<listitem>
+	  <para>pointer to &fe-sec-voltage;</para>
+	</listitem>
       </varlistentry>
     </variablelist>
   </refsect1>