arm64: dts: rockchip: Add RK3399 NanoPi R4S Enterprise Edition

The only diffrence against the standrard edition is that the enterprise
one has a built-in EEPROM chip which stores a globally unique MAC address.

Signed-off-by: Tianling Shen <cnsztl@gmail.com>
Link: https://lore.kernel.org/r/20220915022511.4267-2-cnsztl@gmail.com


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