datapath: initialize bridge port state correctly

The following commit introduced the port state OVDK_VPORT_STATE_NEVER_USED: commit 07e3d9d6 (datapath: Add additional port states).

The port state OVDK_VPORT_STATE_NEVER_USED is changed in adding IN port,
and IN port must be added before OUT port in the status handling.

ovs-vswitchd never requests to add IN port of bridge port.
So it means that adding OUT port of bridge port is not workable
because the status is never set to OVDK_VPORT_STATE_IN_USE_FIRST_USE.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Hiroaki Yamamoto <yamamoto.hrk@ncos.nec.co.jp>
Reviewed-by: Hayato Momma <h-momma@ce.jp.nec.com>
Acked-by: Mark Kavanagh <mark.b.kavanagh@intel.com>