ixv(4): Fix more tinderbox builds by adding missing declarations.

Sponsored by: Intel Corporation

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