Merge tag 'u-boot-rockchip-20230421' of https://source.denx.de/u-boot/custodians...

- Add rk3588 evb support;
- Update pinctrl for rk3568 and rk3588;
- Update rk3288 dts;
- Update mmc support for rk3568 and rk3588;
- Add rng support for rk3588;
- Add DSI support for rk3568;
- Some other misc fixes in dts, config, driver;

diff --cc arch/arm/dts/Makefile
Simple merge

diff --cc drivers/clk/Kconfig
Simple merge

diff --cc drivers/clk/Makefile
Simple merge