powerpc/xics: fix refcount leak in icpopalinit()
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 6a61a97106279c2aa16fbbb2a171fd5dde127d23. For more details please see the references link.