crypto: iaa - Fix a soft-lockup

JIRA: https://issues.redhat.com/browse/RHEL-49539

Fix potential infinite loop in check_completion()
in the IAA driver code. Update IAA code to v6.12.
All the commits apply cleanly, no conflicts, no
changes vs the upstream.

Signed-off-by: Vladis Dronov <vdronov@redhat.com>