drm/msm: Stop using drm_framebuffer_unregister_private

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

Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1482835765-12044-1-git-send-email-daniel.vetter@ffwll.ch

drivers/gpu/drm/msm/msm_fbdev.c

@@ -174,10 +174,8 @@ fail_unlock:
 fail:
 
 	if (ret) {
-		if (fb) {
-			drm_framebuffer_unregister_private(fb);
+		if (fb)
 			drm_framebuffer_remove(fb);
-		}
 	}
 
 	return ret;
@@ -247,7 +245,6 @@ void msm_fbdev_free(struct drm_device *dev)
 	/* this will free the backing object */
 	if (fbdev->fb) {
 		msm_gem_put_vaddr(fbdev->bo);
-		drm_framebuffer_unregister_private(fbdev->fb);
 		drm_framebuffer_remove(fbdev->fb);
 	}