Pull up the following (all via patch) requested by msaitoh in ticket #1231:

sys/dev/pci/ixgbe/ixgbe.c 1.259, 1.278-1.279
sys/dev/pci/ixgbe/ixgbe.h 1.75
sys/dev/pci/ixgbe/ixgbe_netbsd.h 1.12
sys/dev/pci/ixgbe/ixgbe_vf.c 1.24-1.26
sys/dev/pci/ixgbe/ixgbe_x550.c 1.17
sys/dev/pci/ixgbe/ixv.c 1.155-1.156
sys/dev/pci/ixgbe/ix_txrx.c 1.64-67
sys/dev/pci/files.pci 1.436
share/man/man4/ixg.4 1.13-1.14
share/man/man4/ixv.4 1.6-1.7

- Fix a problem that the RX path stalled when the mbuf cluster is
  exhausted.
- Modify some parameters to reduce packet dropping. See also the
  manual's OPTIONS section for the detail.
- ixv(4): The max number of queue(pair) is not 7 but 8. Correctly
  reset the hardware.
- Add "TX " to "Queue No Descriptor Available" evcnt(9) name to make
  it more understandable.
- Fix a bug that some advertise speeds can't be set with
  hw.ixgN.advertise_speed if both 2.5G and 5G are set. Fix the error
  message, too.
- Fix typo in comment or debug message.

(martin)