arm64: dts: rockchip: Add rk3588-rock-5b analog audio

Add the necessary DT nodes for the Rock 5B board to enable the analog
audio support provided by the Everest Semi ES8316 codec.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Christopher Obbard <chris.obbard@collabora.com>
Link: https://lore.kernel.org/r/20230402095054.384739-6-cristian.ciocaltea@collabora.com


[adapted to the fan addition I applied slightly earlier]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>