MAINTAINERS: Add a few DRM drivers by Dave Airlie

Almost exclusively done by Dave Airlie.

Explicitly list him as a maintainer and classify them as "Odd Fixes" as I
doubt he's got much time for them these days.

Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1461279842-28695-14-git-send-email-emil.l.velikov@gmail.com