Pull request of 2018-12-05

Page flip with damage by Deepak and others,
Various vmwgfx minor fixes anc cleanups.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181205103554.3675-1-thellstrom@vmware.com