igt/pm_rpm: Avoid at_exit_drm_fd

Keep the drm_fd owned by pm_rpm as we need to relinquish all ownership
of the device in order to unload the module.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Imre Deak <imre.deak@intel.com>
1 file changed