arm64: dts: rockchip: Enable HDMI audio on ODROID-M1.

This enables the i2s0 controller and the hdmi-sound node on the
ODROID-M1.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Tested-by: Dan Johansen <strit@manjaro.org>
Link: https://lore.kernel.org/r/20220930051246.391614-8-aurelien@aurel32.net


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