targetctl: fix restore

There is no clear_existing argument.
restore_from_file() always clears the config first.

Signed-off-by: Johannes Dewender <github@JonnyJD.net>
root: fix restore_from_file

That was the argument name in targetctl,
which isn't visible here.

Signed-off-by: Johannes Dewender <github@JonnyJD.net>
Merge pull request #41 from JonnyJD/fix_restore

Fix targetctl restore