Following patch adds additional argument to the create AH function, so it
make sense to group ah_attr and flags arguments in struct.

Link: https://lore.kernel.org/r/20200430192146.12863-13-maorg@mellanox.comSigned-off-by: NMaor Gottlieb <maorg@mellanox.com>
Acked-by: NDevesh Sharma <devesh.sharma@broadcom.com>
Acked-by: NGal Pressman <galpress@amazon.com>
Acked-by: NWeihang Li <liweihang@huawei.com>
Reviewed-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>