This revision adds support to if_rt for more SoCs.
The SoCs I've tried the driver with include the following:
RT3050, RT5350, RT3662, RT3883, MT7620, MT7621, MT7688.
On boards, based on the above SoCs traffic is passing through correctly and the boards survive a flood ping with very little or no drops (drops may be caused elsewhere in my test setup, however).
One issue still remains and needs to be fixed in the future: if_rt does not survive an ifconfig rt0 down/ifconfig rt0 up cycle.
This issue existed before this commit as well, however.