linux-imx

RDMA/core: Rename ports_parent to ports_kobj

Normally kobj objects have kobj suffix to reflect it.
Rename ports_parent to ports_kobj.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>