powerpc/rtas: avoid scheduling in rtasosterm()
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 v5.10.163 by commit 6f7e2fcab73372a371ab4017cbedf7a71f4f9b40. For more details please see the references link.