drm/gpu.tmpl: Don't forget to rename the include directives, too

We need to get folks to run

$ make htmldocs

more often and actually check the output. With the fancy new sphinx
stuff there's hopefully no more excuses.

Fixes: 286dbb8d ("drm/atomic: Rename async parameter to nonblocking.")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464729075-22243-4-git-send-email-daniel.vetter@ffwll.ch

Documentation/DocBook/gpu.tmpl

@@ -1570,7 +1570,7 @@ void intel_crt_init(struct drm_device *dev)
       </sect3>
       <sect3>
 	<title>Implementing Asynchronous Atomic Commit</title>
-!Pdrivers/gpu/drm/drm_atomic_helper.c implementing async commit
+!Pdrivers/gpu/drm/drm_atomic_helper.c implementing nonblocking commit
       </sect3>
       <sect3>
 	<title>Atomic State Reset and Initialization</title>