Merge branch 'ncsi-mac-address-command'

Patrick Williams says:

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net/ncsi: Add NC-SI 1.2 Get MC MAC Address command

NC-SI 1.2 has now been published[1] and adds a new command for "Get MC
MAC Address".  This is often used by BMCs to get the assigned MAC
address for the channel used by the BMC.

This change set has been tested on a Broadcomm 200G NIC with updated
firmware for NC-SI 1.2 and at least one other non-public NIC design.

1. https://www.dmtf.org/sites/default/files/standards/documents/DSP0222_1.2.0.pdf


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Signed-off-by: David S. Miller <davem@davemloft.net>