drm: ->agp_init can't fail
Thanks to the removal of REQUIRE_AGP we can use a void return value and shed a bit of complexity. Reviewed-by: NDavid Herrmann <dh.herrmann@gmail.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: NDave Airlie <airlied@redhat.com>
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