mxge: Sync w/ FreeBSD

- Update firmware
- Sync w/ FreeBSD if_mxge.c rev 254263

Local changes:
- Adjust output path a little bit:
o Utilize bus_dmamap_load_mbuf_defrag()
o Utilize the header l

mxge: Sync w/ FreeBSD

- Update firmware
- Sync w/ FreeBSD if_mxge.c rev 254263

Local changes:
- Adjust output path a little bit:
o Utilize bus_dmamap_load_mbuf_defrag()
o Utilize the header length fields in mbuf pkthdr instead of
peeking at the packet data
- Change TSO mode to NDIS mode
- Minor white space changes
- Nuke mxge_lro.c; we won't need it

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import mxge from FreeBSD as is

Untouched; not hooked into build; will not compile