Add support for ASUS RT-AX89X AX6000

[sppmaster]

Wow, I have to agree completely with @frollic and @BrainSlayer opinions.

@shmerl

If you know any other cheaper / better options - I'd be glad to check it out. My requirement is to have open source firmware and SFP+ ports.

I have a Mikrotik RB5009 too but used for other purposes.

Add support for MikroTik RB5009UG

Interesting new home lab router from Mikrotik, the RB5009UG: Would be nice if we can get OpenWrt support for that device.