Asus TUF AX4200 support

I haven't seen DFS detected in the logs yet but haven't been looking. This comes up looking for the valid channel with some interesting ways to test the fallback channels for later. The only valid 160mhz non DFS range is in the 6ghz space, which might explain how it gets to 149. Half of ch36@160 needs DFS so it might get skiped.

option channel 'auto'
option channels '100 36'

I don't see a way to drop to 80mhz on DFS detection. It also shouldn't kill the whole range, just that freq.