Now that drm core knows about private planes, it cleans them up for us.
Trying to do this twice results in badness.
Signed-off-by: Rob Clark <robdclark@gmail.com>
 {
        struct mdp4_crtc *mdp4_crtc = to_mdp4_crtc(crtc);
 
-       mdp4_crtc->plane->funcs->destroy(mdp4_crtc->plane);
-
        drm_crtc_cleanup(crtc);
        drm_flip_work_cleanup(&mdp4_crtc->unref_fb_work);
        drm_flip_work_cleanup(&mdp4_crtc->unref_cursor_work);
 
 {
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
 
-       mdp5_crtc->plane->funcs->destroy(mdp5_crtc->plane);
-
        drm_crtc_cleanup(crtc);
        drm_flip_work_cleanup(&mdp5_crtc->unref_fb_work);