RFC: Add support for i226

[koalo]

Hi Hector, I switched to hardware using the i226-V and for that just copy/pasted the code for the i225 and it seems to work for me on first glance. I am a little confused why you excluded i226-V (as well as i225-V) since I did not find any indication in the datasheets that these devices do not support TSN. Also, since the i225 and i226 are so close, it might make sense to merge them into a single driver file.

What are your opinions on that topic?

Greetings, Florian