ocs_fc: Fix device lost timer where device is not getting deleted.

Issue: Devices wont go away after the link down.

Device lost timer functionality in ocs_fc is broken,
is_target flag is not set in the target database and target delete is skipped.

Fix: Remove unused flags and delete the device when timer expires.

Reported by: ken@kdm.org
Reviewed by: mav, ken

(cherry picked from commit 41e946694333bcc6f64242f294312553f2ef2dcd)