fbdev: Force module load

If there are no /dev/fbN, force loading of the first available drm
module and try again.

v2: Use drm_load_module() directly

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2582


Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>