MFC: r261529

Try to make the style used here consistent.
MFC: r261531

- Implement the RX EARLYOFF and RXDV GATED bits as done by RealTek's Linux
  driver as of version 8.037.00 for RTL8168{E-VL,EP,F,G,GU} and RTL8411B.
  This makes reception of packets work with the RTL8168G (HW rev. 0x4c000000)
  in my Shuttle DS47.
- Consistently use RL_MSI_MESSAGES.
In joint forces with:	yongari