staging: fsl-dpaa2/ethsw: Remove netdevice on port probing error

If the ethsw_port_init() call failed, the netdevice remains registered in
the system.

Use labels to ensure that netdevice is unregistered and freed in this case.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/1562336836-17119-4-git-send-email-ioana.ciornei@nxp.com


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