drm/cma-helper: Stop using drm_framebuffer_unregister_private

This is the deprecated function for when you embedded the framebuffer
somewhere else (which breaks refcounting). But cma helpers are using
drm_framebuffer_remove and a free-standing fb, so this is rendundant.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1482835765-12044-2-git-send-email-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_fb_cma_helper.c

@@ -473,8 +473,7 @@ drm_fbdev_cma_create(struct drm_fb_helper *helper,
 	return 0;
 
 err_cma_destroy:
-	drm_framebuffer_unregister_private(&fbdev_cma->fb->fb);
-	drm_fb_cma_destroy(&fbdev_cma->fb->fb);
+	drm_framebuffer_remove(&fbdev_cma->fb->fb);
 err_fb_info_destroy:
 	drm_fb_helper_release_fbi(helper);
 err_gem_free_object:
@@ -574,10 +573,8 @@ void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
 		drm_fbdev_cma_defio_fini(fbdev_cma->fb_helper.fbdev);
 	drm_fb_helper_release_fbi(&fbdev_cma->fb_helper);
 
-	if (fbdev_cma->fb) {
-		drm_framebuffer_unregister_private(&fbdev_cma->fb->fb);
-		drm_fb_cma_destroy(&fbdev_cma->fb->fb);
-	}
+	if (fbdev_cma->fb)
+		drm_framebuffer_remove(&fbdev_cma->fb->fb);
 
 	drm_fb_helper_fini(&fbdev_cma->fb_helper);
 	kfree(fbdev_cma);