RfC: MAINTAINERS update for qemu drm drivers.

[Gerd Hoffmann]

  Hi,

> Also I think one shared git repo for all of them would be
> good.

Yep, I'm doing that (see today's drm-qemu pull req @ dri-devel).
But, yes, I can place the git repo link in MAINTAINERS too.

cheers,
  Gerd