ARM: dts: rockchip: Add HDMI support to rk3288-veyron-analog-audio

All boards using rk3288-veyron-analog-audio.dtsi have HDMI audio.
Specify the support of HDMI audio on machine driver using
rockchip,hdmi-codec property so machine driver creates HDMI audio device.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Link: https://lore.kernel.org/r/20191028071930.145899-6-cychiang@chromium.org


Signed-off-by: Heiko Stuebner <heiko@sntech.de>