Merge tag 'drm-misc-next-fixes-2019-01-02' of git://anongit.freedesktop.org/drm/drm...

Fixes for v4.21:
- Fix null pointer dereference on null state pointer.
- Fix leaking damage clip when destroying plane state.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/46c4dbcd-dc23-7b46-fda9-16fe33e6ceef@linux.intel.com