Merge branch 'dsa-phys_port_name'

Florian Fainelli says:

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net: dsa: Implement ndo_get_phys_port_name()

This patch series implements ndo_get_phys_port_name() so we can revert
ndo_get_phys_id() which was (ab)used in the DSA layer.
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Signed-off-by: David S. Miller <davem@davemloft.net>