[media] DocBook: fix xref to the FE open() function

Instead of going to the V4L2 open(), use the xref to the
proper place at the frontend ioctls that were already
reformatted.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/dvb/dvbproperty.xml

@@ -1250,7 +1250,7 @@ enum fe_interleaving {
       <varlistentry>
 	<term><parameter>fd</parameter></term>
 	<listitem>
-	  <para>&fd;</para>
+	  <para>&fe_fd;</para>
 	</listitem>
       </varlistentry>
       <varlistentry>
@@ -1308,7 +1308,7 @@ statistics from the frontend.
       <varlistentry>
 	<term><parameter>fd</parameter></term>
 	<listitem>
-	  <para>&fd;</para>
+	  <para>&fe_fd;</para>
 	</listitem>
       </varlistentry>
       <varlistentry>

Documentation/DocBook/media/dvb/frontend_get_info.xml

@@ -27,7 +27,7 @@
       <varlistentry>
 	<term><parameter>fd</parameter></term>
 	<listitem>
-	  <para>&fd;</para>
+	  <para>&fe_fd;</para>
 	</listitem>
       </varlistentry>
       <varlistentry>

Documentation/DocBook/media/dvb/frontend_read_status.xml

@@ -27,7 +27,7 @@
       <varlistentry>
 	<term><parameter>fd</parameter></term>
 	<listitem>
-	  <para>&fd;</para>
+	  <para>&fe_fd;</para>
 	</listitem>
       </varlistentry>
       <varlistentry>

Documentation/DocBook/media_api.tmpl

@@ -7,6 +7,7 @@
 <!ENTITY eg                     "e.&nbsp;g.">
 <!ENTITY ie                     "i.&nbsp;e.">
 <!ENTITY fd                     "File descriptor returned by <link linkend='func-open'><function>open()</function></link>.">
+<!ENTITY fe_fd                  "File descriptor returned by <link linkend='frontend_f_open'><function>open()</function></link>.">
 <!ENTITY i2c                    "I<superscript>2</superscript>C">
 <!ENTITY return-value		"<title>Return Value</title><para>On success <returnvalue>0</returnvalue> is returned, on error <returnvalue>-1</returnvalue> and the <varname>errno</varname> variable is set appropriately. The generic error codes are described at the <link linkend='gen-errors'>Generic Error Codes</link> chapter.</para>">
 <!ENTITY return-value-dvb	"<para>RETURN VALUE</para><para>On success <returnvalue>0</returnvalue> is returned, on error <returnvalue>-1</returnvalue> and the <varname>errno</varname> variable is set appropriately. The generic error codes are described at the <link linkend='gen-errors'>Generic Error Codes</link> chapter.</para>">