RDMA/i40iw: Make sure to initialize ib_device_ops

The initialization of the ib_device_ops was dropped by mistake when
rebasing the ib_device_ops series, this patch fixes that.

Fixes: 15644f57

 ("RDMA/i40iw: Initialize ib_device_ops struct")
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>