arm64: dts: rockchip: Enable HDMI audio on rk3328-roc-cc

The RK3328-ROC-CC already has HDMI display output enabled. Now that
audio for the HDMI controller is supported, it can be enabled as well.

Enable the simple-audio-card, and the I2S interface the audio is fed
from.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20201126073336.30794-3-wens@kernel.org


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