arm64: dts: rockchip: Add rk3588-evb1 board

Add board file for the RK3588 evaluation board. While the hardware
offers plenty of peripherals and connectivity this basic implementation
just handles things required to successfully boot Linux from eMMC,
connect via UART or Ethernet.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
[rebase, update commit message, use EVB1 for SoC bringup]
Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Jagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20230109155801.51642-6-sebastian.reichel@collabora.com


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