Link flaps on NC-SI when the host is booting

[bluecmd]

trafficstars

Right now, and in other BMCs as well, the link flaps when the power state changes for the host.

There might be nothing we can do about that, but we should have a look to be sure that's the case.

[bluecmd]

The Tioga Pass specification has these IPMI commands:

Set PHY Reset Status 0x30/00 0x30
Change setting to enable/disable shared NIC Phy reset of all shared NICs
during system warm reboot and DC cycle

Get PHY Reset Status 0x30/00 0x31
Read setting of Keep NIC Phy Link up feature of all shared NICs 

They might be relevant to changing this behavior.