gbm: move gbm_drm_device::driver_name to gbm_dri_device

The former already keeps track of the DRI module opened, based on the
driver_name provided. So let's keep them together.

As a nice bonus this Will allows us to remove the gbm_drm_device all
together with next patch.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Rob Herring <robh@kernel.org>
4 files changed