RK3399 and RK3288 shared the same eDP IP controller, only some light
difference with VOP configure and GRF configure.
Signed-off-by: NYakir Yang <ykk@rock-chips.com>
Acked-by: NMark Yao <mark.yao@rock-chips.com>
Reviewed-by: NTomasz Figa <tomasz.figa@chromium.com>
Reviewed-by: NSean Paul <seanpaul@chromium.org>