arm64: dts: rockchip: Add I2S rk3588 nodes

In addition to the five I2S/PCM/TDM controllers and the two I2S/PCM
controllers shared between the RK3588 and RK3588S SoCs, RK3588 provides
another group of four I2S/PCM/TDM controllers.

Add the DT nodes corresponding to the additional controllers.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20230402095054.384739-5-cristian.ciocaltea@collabora.com


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