RDMA/hns: Remove redundant 'bt_level' for hem_list_alloc_item()

RDMA/hns: Remove redundant 'bt_level' for hem_list_alloc_item()

[ Upstream commit be1eeb667eb748391b1c8158678fe4d892187793 ]

The 'bt_level' parameter is not used in hem_list_alloc_item(),
so remove it.

Link: https://lore.kernel.org/r/20220922123315.3732205-6-xuhaoyue1@hisilicon.com
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: 8673a6c2d9e4 ("RDMA/hns: Fix mapping error of zero-hop WQE buffer")
Signed-off-by: Sasha Levin <sashal@kernel.org>