Adding OpenWrt support for Xiaomi "Redmi Router AX6S"/"Xiaomi Router AX3200"

[remittor]

@danpawlik

I create an image base on your change + force update via Luci image (squashfs-factory.bin) and the router is bricked.

It is not permissible to do this!
I'm still thinking about how to implement this using facinstall