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 r294734, r295093 & r295094 ixgbe fixes

MFC r294734
Fix ixgbe compliation with DBG 1

MFC r295093
Configure ixgbe phy & gbic power

MFC r295094
Fix ixgbe flow control autoneg reporting

Approved by: re (marius)
Sponsored by: Multiplay

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

MFC ixgbe commits for 10.2:

- r280182 - Split the driver into independent pf/vf loadables
- r280197 - Resolve build issues
- r280204 - Fix multiple same-name devclasses
- r280228 - Fix i386 LINT build issues / remove unused variable
- r280252 - Fix building ixgbe with gcc
- r280962 - Make changes to busdma code similar to r257541
- r281772 & r281773 - Remove unused variable
- partial r282280 - stats counter update (ix-only)
- r282289 - Add X550 support
- r282290 - Add X550 makefile updates
- r282293 - Add ixgbe_x550.c to conf/files
- r282299 - Fix gcc compile (extraneous extern declaration)

Finally, add ix_txrx.c to conf/files because it's required for compile in stable/10.

Approved by: jfv (mentor)

MFC ixgbe commits for 10.2:

- r280182 - Split the driver into independent pf/vf loadables
- r280197 - Resolve build issues
- r280204 - Fix multiple same-name devclasses
- r280228 - Fix i386 LINT build issues / remove unused variable
- r280252 - Fix building ixgbe with gcc
- r280962 - Make changes to busdma code similar to r257541
- r281772 & r281773 - Remove unused variable
- partial r282280 - stats counter update (ix-only)
- r282289 - Add X550 support
- r282290 - Add X550 makefile updates
- r282293 - Add ixgbe_x550.c to conf/files
- r282299 - Fix gcc compile (extraneous extern declaration)

Finally, add ix_txrx.c to conf/files because it's required for compile in stable/10.

Approved by: jfv (mentor)