ixgbe(4): Update to 3.2.11-k

Includes:

1. Support for X553 (Denverton) Ethernet devices.
2. Initialization code refactoring.
3. ixgbe-specific netmap code moved to ixgbe folder
(but not removed from dev/netmap/).
4. VF driver full split. Some cleanup can be had due to redundant code,
but this split goes inline with the refactoring.

NOTE: This is a direct commit to stable/10. Newer branches will receive an
iflib-converted version of ixgbe, with these updates included, instead.

Differential Revision: https://reviews.freebsd.org/D9310
Submitted by: Jeb Cramer (jeb.j.cramer@intel.com)
Tested by: Jeffrey Pieper (jeffrey.e.pieper@intel.com)
Sponsored by: Intel Corporation

MFC r292674
Update ixgbe(4) to Intel FreeBSD Networking Group version 3.1.13-k.

MFC r292571 and r292697
Add support for X552 and X550T.

MFC r293334
Fix SFP module insertion post boot.

MFC r293338
Fix VF handling of VLANs for Amazon Cloud.

Reviewed by: erj smh ngie jeffrey.e.pieper@intel.com
Approved by: re (marius)
Relnotes: Yes
Sponsored by: Intel Corporation and Limelight Networks
Differential Revision: https://reviews.freebsd.org/D5117