backports: remove DRM driver

backports: remove DRM driver

Maintaining the DRM driver takes a lot of recourses as there they are
depending on many API changes done to the core kernel code and
currently we do not have that many recourses to follow them. On the
other side one needs also new userspace drivers to make use of the new
features added to the DRM kernel drivers and it is not easy to update
the X drivers. Therefore we came to the conclusion to remove the drm
drivers for now.

There were also some problems with some DRM drivers, like the Intel
i915 driver caused kernel panic on some systems and was probably only
usable on some very recent kernel versions.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>