x86/pm: Fix false positive kmemleak report in msr_build_context()
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 v4.9.318 by commit f0e5dce9e2decf8962942d031a29c50b471bb38e, it was introduced in version v4.5 by commit 7a9c2dd08eadd5c6943115dbbec040c38d2e0822. For more details please see the references link.