drm: remove return value from drm_helper_mode_fill_fb_struct

Rightfully no driver ever checked this - it can't fail.
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_crtc_helper.c

@@ -923,8 +923,8 @@ void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
 }
 EXPORT_SYMBOL(drm_helper_connector_dpms);
 
-int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
-				   struct drm_mode_fb_cmd2 *mode_cmd)
+void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
+				    struct drm_mode_fb_cmd2 *mode_cmd)
 {
 	int i;
 
@@ -937,8 +937,6 @@ int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
 	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
 				    &fb->bits_per_pixel);
 	fb->pixel_format = mode_cmd->pixel_format;
-
-	return 0;
 }
 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
 

include/drm/drm_crtc_helper.h

@@ -139,8 +139,8 @@ extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
 
 extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
 
-extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
-					  struct drm_mode_fb_cmd2 *mode_cmd);
+extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
+					   struct drm_mode_fb_cmd2 *mode_cmd);
 
 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
 				       const struct drm_crtc_helper_funcs *funcs)