arm64: dts: rockchip: Add rk3576 SoC base DT

This device tree contains all devices necessary for booting from network
or SD Card.

It supports CPU, CRU, PM domains, dma, interrupts, timers, UART, I2C
and SDHCI (everything necessary to boot Linux on this system on chip)
as well as Ethernet, SPI, GPU and RTC.

Signed-off-by: Liang Chen <cl@rock-chips.com>
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Tested-by: Liang Chen <cl@rock-chips.com>
Link: https://lore.kernel.org/r/20240903152308.13565-9-detlev.casanova@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>