Merge branch 'devlink-port-mac-addr' into next

Parav Pandit  says:

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Currently ip link set dev <pfndev> vf <vf_num> <param> <value> has
few below limitations.

1. Command is limited to set VF parameters only.
It cannot set the default MAC address for the PCI PF.

2. It can be set only on system where PCI SR-IOV is supported.
In smartnic based system, eswitch of a NIC resides on a different
embedded cpu which has the VF and PF representors for the SR-IOV
support on a host system in which this smartnic is plugged-in.

3. It cannot setup the function attributes of sub-function described
in detail in comprehensive RFC [1] and [2].

This series covers the first small part to let user query and set MAC
address (hardware address) of a PCI PF/VF which is represented by
devlink port.

[1] https://lore.kernel.org/netdev/20200519092258.GF4655@nanopsycho/
[2] https://marc.info/?l=linux-netdev&m=158555928517777&w=2

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Signed-off-by: David Ahern <dsahern@kernel.org>