drm: drm_irq.h header cleanup

- Drop extern for functions, it's noise.
- Move&consolidate drm.ko internal parts into drm-internal.h.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161114090255.31595-6-daniel.vetter@ffwll.ch
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index b8cc0fc..db80ec8 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -24,9 +24,6 @@
 #define DRM_IF_MAJOR 1
 #define DRM_IF_MINOR 4
 
-/* drm_irq.c */
-extern unsigned int drm_timestamp_monotonic;
-
 /* drm_fops.c */
 extern struct mutex drm_global_mutex;
 void drm_lastclose(struct drm_device *dev);
@@ -56,6 +53,11 @@ int drm_clients_info(struct seq_file *m, void* data);
 int drm_gem_name_info(struct seq_file *m, void *data);
 
 /* drm_irq.c */
+extern unsigned int drm_timestamp_monotonic;
+
+/* IOCTLS */
+int drm_wait_vblank(struct drm_device *dev, void *data,
+		    struct drm_file *filp);
 int drm_control(struct drm_device *dev, void *data,
 		struct drm_file *file_priv);
 int drm_modeset_ctl(struct drm_device *dev, void *data,