arm64: dts: rockchip: Enable HDMI sound on SOQuartz

This patch enables the i2s0 node on SOQuartz, which is responsible
for hdmi audio, and adds an hdmi-sound node to enable said audio.

Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Link: https://lore.kernel.org/r/20221112160404.70868-4-frattaroli.nicolas@gmail.com


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