CVE-2022-48644 net/sched: taprio: avoid disabling offload when it was never enabled

In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: avoid disabling offload when it was never enabled In an incredibly strange API design decision, qdisc-destroy gets called even if qdisc-init never succeeded, not exclusively since commit 87b60cfacf9f "netsched:...