This patch will:

- Update ixgbe shared code
- Add support for Intel(R) Ethernet Connection X552 1000BASE-T
- Add error handling for link state check preventing VF from stopping traffic
  after changing PF's MTU value

Submitted by: Krzysztof Galazka <krzysztof.galazka@intel.com>
Reviewed by: Intel Networking
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D13885

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Includes:

- Support for X550EM devices.
- Support for Bypass adapters.
- Flow Director code moved to separate files
- SR-IOV code moved to separate files
- Netmap code moved to separate files

Differential Revision:	https://reviews.freebsd.org/D11232
Submitted by:	Jeb Cramer <cramerj@intel.com>
Reviewed by:	erj@
Tested by:	Jeff Pieper <jeffrey.e.pieper@intel.com>
Sponsored by:	Intel Corporation

No functional change.

Differential Revision:	https://reviews.freebsd.org/D6177

Add support for two new devices:  X552 SFP+ 10 GbE, and the single port
version of X550T.

Submitted by:	erj
Reviewed by:	gnn
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D4186

These include standalone X550 adapters, X552 10GbE backplane, and
X552/X557-AT 10GBASE-T; with the latter two being integrated into Xeon D SoCs.

As well, this bumps the ixgbe version number to 2.8.3, and includes updates
to shared code for support for the new devices.

Differential Revision: D2414
Reviewed by:	gnn, adrian
Approved by:	jfv (mentor), gnn (mentor)

then correct a NETMAP problem resulting from the split, and finally
temporarily disable the X550 functionality.

	- Split the driver into independent pf and vf loadables. This is
	  in preparation for SRIOV support which will be following shortly.
	  This also allows us to keep a seperate revision control over the
	  two parts, making for easier sustaining.
	- Make the TX/RX code a shared/seperated file, in the old code base
	  the ixv code would miss fixes that went into ixgbe, this model
	  will eliminate that problem.
	- The driver loadables will now match the device names, something that
	  has been requested for some time.
	- Rather than a modules/ixgbe there is now modules/ix and modules/ixv
	- It will also be possible to make your static kernel with only one
	  or the other for streamlined installs, or both.

Enjoy!

Submitted by: jfv and erj

(which should be a PCIE Gen 3 slot for this adapter) by looking back thru the PCI
parent devices to the slot device.

The fix above also corrects the bandwidth display to GT/s rather than the
incorrect Gb/s

Next, allow the use of ALTQ if you select the compile option IXGBE_LEGACY_TX.

Allow the use of 'unsupported' optic modules by a compile option as well.

Add a phy reset capability into the stop code, this is so a static configured
driver will still behave properly when taken down (not being able to unload it).

This revision synchronizes the shared code with Intel internal current code,
and note that it now includes DCB supporting code, this was necessitated by
some internal changes with the code, but it also will provide the opportunity
to develop this feature in the core driver down the road.

I have edited the README to get rid of some of the worse anachronisms in it
as well, its by no means as robust as I might wish at this point however.

Oh, I also have included some conditional stuff in the code so it will be
compatible in both the 9.X and 10 environments.

Performance has been a focus in recent changes and I believe this revision
driver will perform very well in most workloads.

MFC after: 2 weeks

Fixes:
	- flow control - don't override user value on re-init
	- fix to make 1G optics work correctly
	- change to interrupt enabling - some bits were incorrect
	  for certain hardware.
	- certain stats fixes, remove a duplicate increment of
	  ierror, thanks to Scott Long for pointing these out.
	- shared code link interface changed, requiring some
	  core code changes to accomodate this.
	- add an m_adj() to ETHER_ALIGN on the recieve side, this
	  was requested by Mike Karels, thanks Mike.
	- Multicast code corrections also thanks to Mike Karels.