ARM: dts: rockchip: Add HDMI i2c unwedging for rk3288-veyron

Veyron uses the builtin i2c controller that's part of dw-hdmi.  Hook
up the unwedging feature.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>