drm: make drm_crtc_internal.h self-contained

Do not require users of drm_crtc_internal.h to include other
files just to let it build
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Link: https://patchwork.freedesktop.org/patch/msgid/20190526173535.32701-4-sam@ravnborg.org

drivers/gpu/drm/drm_crtc_internal.h

@@ -31,14 +31,30 @@
  * and are not exported to drivers.
  */
 
-enum drm_mode_status;
+#include <linux/types.h>
+
+enum drm_color_encoding;
+enum drm_color_range;
 enum drm_connector_force;
+enum drm_mode_status;
 
-struct drm_display_mode;
-struct work_struct;
-struct drm_connector;
+struct drm_atomic_state;
 struct drm_bridge;
+struct drm_connector;
+struct drm_crtc;
+struct drm_device;
+struct drm_display_mode;
+struct drm_file;
+struct drm_framebuffer;
+struct drm_mode_create_dumb;
+struct drm_mode_fb_cmd2;
+struct drm_mode_fb_cmd;
+struct drm_mode_object;
+struct drm_plane;
+struct drm_property;
 struct edid;
+struct kref;
+struct work_struct;
 
 /* drm_crtc.c */
 int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,