staging: fsl-dpaa2/ethsw: Add ndo_get_phys_port_name

Add the ndo_get_phys_port_name callback to the ethsw driver.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/1562336836-17119-5-git-send-email-ioana.ciornei@nxp.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>