Support for X553 (Denverton) Ethernet devices

[Cassiano Peixoto]

Hi guys,

I've been playing with Denverton, but I realized that ethernet devices
wasn't recognized.

I found this commit here enabling X553 support on 10-STABLE:
http://freshbsd.org/commit/freebsd/r315333
https://reviews.freebsd.org/D9310

I tested on 10-STABLE and worked fined. But on 11-STABLE it didn't find the
ethernet interfaces.

Seems IFLIB support is needed, anyway I enabled support in kernel but
nothing has changed.

Am I missing something here or support to X553 wasn't added to 11-STABLE?

Thanks.