- Do not set RDMAC_MODE_FIFO_LONG_BURST on 5788
- Do not set WDMAC_MODE_RX_ACCEL on 5788
- Note that 5788 cannot use tagged irq status.
- 5788 cannot do TSO
- 5788 cannot do NETIF_F_HIGHDMA.
- 5901 is 10/100 only.
- Update TSO firmware, add 5705 specific TSO firmware.
- Update TSO packet handling in ->hard_start_xmit() to
  match updated TSO firmware.
- TSO is still off by default until more perf analysis is done.