LU-13799 llite: Simplify cda_no_aio_complete use

LU-13799 llite: Simplify cda_no_aio_complete use

It is better to handle AIO and DIO the same as much as
possible, limiting the difference to setup if possible.

In this spirit, move the check for DIO (is_sync_kiocb()) to
the setup function rather than cleanup and just use
no_aio_complete.

Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I1b91e5b8f42971cb37780597402c4ee94f82a963
Reviewed-on: https://review.whamcloud.com/44154
Reviewed-by: Wang Shilong <wangshilong1991@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>