RK3399 and RK3288 shared the same HDMI IP controller, only some light
difference with GRF configure.
Signed-off-by: NYakir Yang <ykk@rock-chips.com>
Signed-off-by: NMark Yao <mark.yao@rock-chips.com>
Acked-by: NRob Herring <robh@kernel.org>