drm: Clean up planes in atomic commit helper failure path

drm: Clean up planes in atomic commit helper failure path

commit aebe55c2d4b998741c0847ace1b4af47d73c763b upstream.

If waiting for fences fails for blocking commits, planes must be cleaned
up before returning.

Fixes: f6ce410a59a4 ("drm/fence: allow fence waiting to be interrupted by userspace")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170102231427.7192-1-laurent.pinchart@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>