[PATCH] alx: add E2200 support

[Huang, Xiong]

> 
> Great thanks! Please be sure to have the MAINTAINERS file updated
> appropriate with the new support contacts (ie, they'll send replies to bug posts,
> they'll get assigned kernel.org bugzilla tickets, they'll post patches for fixes).
> 
That's the problem, since I don't know who is the real maintainer later.
Can I use nic-dev at qca.qualcomm.com or unified-drivers at lists.infradead.org as maintainer list ?


Thanks
Xiong