drm/fb-helper: add fb_debug_* to DRM_FB_HELPER_DEFAULT_OPS

Add additional members fb_debug_enter and fb_debug_leave to helper
define. They are shared by all fb_ops implementations.
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Stefan Christ <contact@stefanchrist.eu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1479078208-25221-3-git-send-email-contact@stefanchrist.eu

include/drm/drm_fb_helper.h

@@ -228,7 +228,9 @@ struct drm_fb_helper {
 	.fb_set_par	= drm_fb_helper_set_par, \
 	.fb_setcmap	= drm_fb_helper_setcmap, \
 	.fb_blank	= drm_fb_helper_blank, \
-	.fb_pan_display	= drm_fb_helper_pan_display
+	.fb_pan_display	= drm_fb_helper_pan_display, \
+	.fb_debug_enter = drm_fb_helper_debug_enter, \
+	.fb_debug_leave = drm_fb_helper_debug_leave
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION
 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,