[drm/qxl 0/6] Various cleanups/fixes

[Christophe Fergeau]

Hey,

This patch series starts by doing some various small cleanups (patch 1 to 4), and
then there are 2 fixes for issues which were noticed in fedora 25, the more annoying one
being the one fixed by patch 5 where the VM screen would constantly flicker
when wayland is used. Patch 6 is very hacky, I'm not familiar at all with that code,
so I don't know what is the correct way of doing it.

Christophe