/* Attempts to add 'devname' as a port on 'dpif', given the combination of
* ODP_PORT_* flags in 'flags'. If successful, returns 0 and sets '*port_nop'
* to the new port's port number (if 'port_nop' is non-null). On failure,
/* Attempts to add 'devname' as a port on 'dpif', given the combination of
* ODP_PORT_* flags in 'flags'. If successful, returns 0 and sets '*port_nop'
* to the new port's port number (if 'port_nop' is non-null). On failure,