Pull up following revision(s) (requested by msaitoh in ticket #1745):

sys/dev/pci/ixgbe/ixgbe.c 1.327-1.332 via patch
sys/dev/pci/ixgbe/ixgbe.h 1.87-1.88
sys/dev/pci/ixgbe/ixv.c 1.184-1.185
sys/dev/pci/ixgbe/ix_txrx.c 1.101
sys/dev/pci/ixgbe/ixgbe_82599.c 1.30
sys/dev/pci/ixgbe/ixgbe_vf.c 1.32-1.33
sys/dev/pci/ixgbe/ixgbe_vf.h 1.18
sys/dev/pci/ixgbe/ixgbe_mbx.h 1.20
sys/dev/pci/ixgbe/ixgbe_type.h 1.57

- Reorder some event counters for readability.
- Rename some descriptions of event counters.
- Count Queue Bytes {Transmit, Receive} counter.
- Improve error check in ixgbe_check_mac_link_vf().
- Add new IXGBE_VF_GET_LINK_STATE message support.
  The VF's link state can be forced to down by PF.
- Update FCTRL after writing multicast filter.
- Update comments.

(martin)