GSD-2023-1002141 ipv4: prevent potential spectre v1 gadget in ip_metrics_convert()

ipv4: prevent potential spectre v1 gadget in ipmetricsconvert 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 v5.10.166 by commit...