RDMA/hns: Remove fixed parameter “timeout” in the mailbox

RDMA/hns: Remove fixed parameter “timeout” in the mailbox

The value of the function parameter “timeout” is unique. Therefore,
it is unnecessary to specify the parameter “timeout” value each time.
So remove it.

Link: https://lore.kernel.org/r/20220302064830.61706-3-liangwenpeng@huawei.com
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>