[media] DocBook: fix FE_SET_PROPERTY ioctl arguments

FE_SET_PROPERTY/FE_GET_PROPERTY actually expects a struct dtv_properties
argument.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/DocBook/media/dvb/fe-get-property.xml

@@ -17,7 +17,7 @@
 	<funcdef>int <function>ioctl</function></funcdef>
 	<paramdef>int <parameter>fd</parameter></paramdef>
 	<paramdef>int <parameter>request</parameter></paramdef>
-	<paramdef>struct dtv_property *<parameter>argp</parameter></paramdef>
+	<paramdef>struct dtv_properties *<parameter>argp</parameter></paramdef>
       </funcprototype>
     </funcsynopsis>
   </refsynopsisdiv>