When creating or re-registering an MR, storing the PDN, access flag and
IOVA information ASAP can simplify the number of parameters passed into
the subsequent process.

Link: https://lore.kernel.org/r/1611395282-991-3-git-send-email-liweihang@huawei.comReported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NLang Cheng <chenglang@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>