drm/imx: cleanup the imx-drm header

Drop unused defines and obsolete prototypes from the imx-drm.h header.

Reviewed-by: Philipp Zabel <[email protected]>
Acked-by: Rob Herring <[email protected]>
Tested-by: Chris Healy <[email protected]>
Tested-by: Philipp Zabel <[email protected]> # on imx6q-nitrogen6x
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Dmitry Baryshkov <[email protected]>

Author: lumag

drivers/gpu/drm/imx/ipuv3/imx-drm.h

@@ -3,14 +3,9 @@
 #define _IMX_DRM_H_
 
 struct device_node;
-struct drm_crtc;
 struct drm_connector;
 struct drm_device;
-struct drm_display_mode;
 struct drm_encoder;
-struct drm_framebuffer;
-struct drm_plane;
-struct platform_device;
 
 struct imx_crtc_state {
 	struct drm_crtc_state			base;
@@ -24,16 +19,9 @@ static inline struct imx_crtc_state *to_imx_crtc_state(struct drm_crtc_state *s)
 {
 	return container_of(s, struct imx_crtc_state, base);
 }
-int imx_drm_init_drm(struct platform_device *pdev,
-		int preferred_bpp);
-int imx_drm_exit_drm(void);
 
 extern struct platform_driver ipu_drm_driver;
 
-void imx_drm_mode_config_init(struct drm_device *drm);
-
-struct drm_gem_dma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
-
 int imx_drm_encoder_parse_of(struct drm_device *drm,
 	struct drm_encoder *encoder, struct device_node *np);