IB/mlx5: Fix passing casted pointer in mlx5_query_port_roce

Fix static checker warning:
        drivers/infiniband/hw/mlx5/main.c:149 mlx5_query_port_roce()
        warn: passing casted pointer '&props->qkey_viol_cntr' to
	'mlx5_query_nic_vport_qkey_viol_cntr()' 32 vs 16.

Fixes: 3f89a643 ("IB/mlx5: Extend query_device/port to support RoCE")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/main.c

@@ -132,6 +132,7 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num,
 	struct mlx5_ib_dev *dev = to_mdev(device);
 	struct net_device *ndev;
 	enum ib_mtu ndev_ib_mtu;
+	u16 qkey_viol_cntr;
 
 	memset(props, 0, sizeof(*props));
 
@@ -146,8 +147,8 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num,
 	props->state            = IB_PORT_DOWN;
 	props->phys_state       = 3;
 
-	mlx5_query_nic_vport_qkey_viol_cntr(dev->mdev,
-					    (u16 *)&props->qkey_viol_cntr);
+	mlx5_query_nic_vport_qkey_viol_cntr(dev->mdev, &qkey_viol_cntr);
+	props->qkey_viol_cntr = qkey_viol_cntr;
 
 	ndev = mlx5_ib_get_netdev(device, port_num);
 	if (!ndev)