e1000e: workaround for packet drop on 82579LM at 100Mbps

[Terry Burton <tez@terryburton.co.uk>]

Hi,

Many (but not all) devices that include an Intel 82579LM NIC have a
hardware fault that results in packet loss that is worked around by
the following recent patch: http://patchwork.ozlabs.org/patch/109926/

More detail provided here:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/870127
https://bugzilla.redhat.com/show_bug.cgi?id=713315

It would be useful for this patch to be applied to backports kernel as
this fault exists on a large number of recent devices.


Thanks,

Terry