This reverts commit 52f5eb60.

Rockchip drm can't work with generic drm_of_component_probe now
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>
Acked-by: NLiviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>