RadxaNaoki

rockchip: add more Radxa boards

1

~~it depends on https://github.com/openwrt/openwrt/pull/15815 and https://github.com/openwrt/openwrt/pull/15861~~

serial console speed for Radxa E25 should be 115200bps instead of 1.5Mbps

6

### Describe the bug CH340B, USB-UART chip, used on E25 for serial console is unstable with 1.5Mbps. for example, if you press and hold enter key on the shell, you...