Replace the open-coded AIL item walking with a proper helper when we're
trying to release an intent item that has been finished.  We add a new
->iop_match method to decide if an intent item matches a supplied ID.
Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: NChandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>