CVE-2025-39944 octeontx2-pf: Fix use-after-free bugs in otx2_sync_tstamp()

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix use-after-free bugs in otx2synctstamp The original code relies on canceldelayedwork in otx2ptpdestroy, which does not ensure that the delayed work item synctstampwork has fully completed if it was already runnin...