x86/pm: Fix false positive kmemleak report in msrbuildcontext()
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 v4.19.247 by commit dc65f93dbcb9270f8d2a8ea643fda63cc89c75c0, it was introduced in version v4.5 by commit 7a9c2dd08eadd5c6943115dbbec040c38d2e0822. For more details please see the references link.