RDMA/mlx5: Remove duplicate pointer assignment in mlx5_ib_alloc_implicit_mr()

The pointer imr->umem is assigned twice. Fix this by removing the
redundant one.

Link: https://lore.kernel.org/r/20220518044914.1903125-1-matsuda-daisuke@fujitsu.comSigned-off-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx5/odp.c

@@ -509,7 +509,6 @@ struct mlx5_ib_mr *mlx5_ib_alloc_implicit_mr(struct mlx5_ib_pd *pd,
 	imr->ibmr.lkey = imr->mmkey.key;
 	imr->ibmr.rkey = imr->mmkey.key;
 	imr->ibmr.device = &dev->ib_dev;
-	imr->umem = &umem_odp->umem;
 	imr->is_odp_implicit = true;
 	xa_init(&imr->implicit_children);