em(4) update finished

[Sepherosa Ziehau <sepherosa@xxxxxxxxx>]

Hi all,

For those that haven't applied
em0.diff(http://leaf.dragonflybsd.org/~sephe/em/em0.diff), please try:
http://leaf.dragonflybsd.org/~sephe/em.diff

For those that have applied em0.diff, please try:
http://leaf.dragonflybsd.org/~sephe/em/em1.diff

Newly supported devices:
82571EB, 82572EI and 82573E adapters

Detailed information of the above patch(em1.diff) is at:
http://leaf.dragonflybsd.org/~sephe/em/clog1

NOTE:
Please test your em's performance after this change.
If it is degenrated, please try tuning
"hw.em?.int_throttle_ceil" according to:
http://www.dragonflybsd.org/cvsweb/src/sys/dev/netif/em/if_em.c#rev1.22

Any feedback is welcome! :-)

Best Regards,
sephe

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