CVE-2025-38126 net: stmmac: make sure that ptp_rate is not 0 before configuring timestamping

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: make sure that ptprate is not 0 before configuring timestamping The stmmac platform drivers that do not open-code the clkptprate value after having retrieved the default one from the device-tree can end up with 0 in...