Description of problem:
Rebooting a host configured as LIO target with cxgbit offload results in loosing the offload setting.

Running `targetcli restoreconfig` does not help, unless configuration is cleared first.

Version-Release number of selected component (if applicable):
kernel-4.18.0-413.el8.x86_64
targetcli-2.1.53-2.el8.noarch
python3-kmod-0.9-20.el8.x86_64
python3-pyparsing-2.1.10-7.el8.noarch
python3-configshell-1.1.28-1.el8.noarch
python3-rtslib-2.1.75-4.el8.noarch
target-restore-2.1.75-4.el8.noarch
python3-urwid-1.3.1-4.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. iscsi/iqn.../tpg1/portals/<IP>/enable_offload true
2. systemctl enable target --now
3. reboot

Actual results:
`targetcli ls`

Same result after running `targetcli restoreconfig /etc/target/saveconfig.json` manually

Expected results:
`targetcli ls`

Workaround is to run:
`targetcli clearconfig confirm=True; targetcli restoreconfig /etc/target/saveconfig.json`

Additional info:
Not a regression, also reproducible on 8.3.0.
Will try RHEL-9 next.