[media] Documentation/DocBook: Rename media fops xml files

By convention, the name of the XML file should match the references
declared at media-entities.tmpl, as, otherwise, some validation
scripts break.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Documentation/DocBook/media-entities.tmpl

@@ -373,9 +373,9 @@
 <!ENTITY sub-media-indices SYSTEM "media-indices.tmpl">
 
 <!ENTITY sub-media-controller SYSTEM "v4l/media-controller.xml">
-<!ENTITY sub-media-open SYSTEM "v4l/media-func-open.xml">
-<!ENTITY sub-media-close SYSTEM "v4l/media-func-close.xml">
-<!ENTITY sub-media-ioctl SYSTEM "v4l/media-func-ioctl.xml">
+<!ENTITY sub-media-func-open SYSTEM "v4l/media-func-open.xml">
+<!ENTITY sub-media-func-close SYSTEM "v4l/media-func-close.xml">
+<!ENTITY sub-media-func-ioctl SYSTEM "v4l/media-func-ioctl.xml">
 <!ENTITY sub-media-ioc-device-info SYSTEM "v4l/media-ioc-device-info.xml">
 <!ENTITY sub-media-ioc-enum-entities SYSTEM "v4l/media-ioc-enum-entities.xml">
 <!ENTITY sub-media-ioc-enum-links SYSTEM "v4l/media-ioc-enum-links.xml">

Documentation/DocBook/v4l/media-controller.xml

@@ -78,9 +78,9 @@
 <appendix id="media-user-func">
   <title>Function Reference</title>
   <!-- Keep this alphabetically sorted. -->
-  &sub-media-open;
-  &sub-media-close;
-  &sub-media-ioctl;
+  &sub-media-func-open;
+  &sub-media-func-close;
+  &sub-media-func-ioctl;
   <!-- All ioctls go here. -->
   &sub-media-ioc-device-info;
   &sub-media-ioc-enum-entities;