RDMA/core: Align abort/commit object scheme for write() and ioctl() paths

Create the same logic flow for the write() interface as we have for the
ioctl() path by making sure that the object is committed or aborted
automatically after HW object creation.

Link: https://lore.kernel.org/r/20200719052223.75245-2-leon@kernel.org


Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>