powerpc/xive: Fix refcount leak in xive_get_max_prio
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 v4.19.256 by commit f658d5b528ce97a68efbb64ee54f6fe0909b189a, it was introduced in version v4.14 by commit eac1e731b59ee3b5f5e641a7765c7ed41ed26226. For more details please see the references link.