drm/i915: Integrate cmd parser kerneldoc

Ville noticed that we have this nice kerneldoc but it's not integrated
anywhere. Fix this asap!

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

Documentation/DocBook/drm.tmpl

@@ -2942,6 +2942,11 @@ int num_ioctls;</synopsis>
 	This sections covers all things related to the GEM implementation in the
 	i915 driver.
       </para>
+      <sect2>
+        <title>Batchbuffer Parsing</title>
+!Pdrivers/gpu/drm/i915/i915_cmd_parser.c batch buffer command parser
+!Idrivers/gpu/drm/i915/i915_cmd_parser.c
+      </sect2>
     </sect1>
   </chapter>
 </part>

drivers/gpu/drm/i915/i915_cmd_parser.c

@@ -28,7 +28,7 @@
 #include "i915_drv.h"
 
 /**
- * DOC: i915 batch buffer command parser
+ * DOC: batch buffer command parser
  *
  * Motivation:
  * Certain OpenGL features (e.g. transform feedback, performance monitoring)