GSD-2022-1002603 powerpc/papr_scm: don't requests stats with '0' sized stats buffer

powerpc/paprscm: don't requests stats with '0' sized stats buffer 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 v5.18.4 by commit...