ptp: unregister virtual clocks when unregistering physical clock.
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.33 by commit b2dea2a696d09163da4cd33cb598ce1f73e86597, it was introduced in version v5.14 by commit 73f37068d540eba5f93ba3a0019bf479d35ebd76. For more details please see the references link.