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 v5.10.121 by commit b6ecf2b7e691eed248290e3dfec22d3093c44e0c, it was introduced in version v4.5 by commit 7a9c2dd08eadd5c6943115dbbec040c38d2e0822. For more details please see the references link.