UM: cpuinfo: Fix a warning for CONFIGCPUMASKOFFSTACK
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 v4.9.331 by commit 8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571. For more details please see the references link.