IB/mlx5: Use 'kvfree()' for memory allocated by 'kvzalloc()'

When 'kvzalloc()' is used to allocate memory, 'kvfree()' must be used to
free it.

Fixes: 1cbe6fc86ccfe ("IB/mlx5: Add support for CQE compressing")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/infiniband/hw/mlx5/cq.c

@@ -849,7 +849,7 @@ static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata,
 	return 0;
 
 err_cqb:
-	kfree(*cqb);
+	kvfree(*cqb);
 
 err_db:
 	mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);