CVE-2022-49353 powerpc/papr_scm: don't requests stats with '0' sized stats buffer

In the Linux kernel, the following vulnerability has been resolved: powerpc/paprscm: don't requests stats with '0' sized stats buffer Sachin reported 1 that on a POWER-10 lpar he is seeing a kernel panic being reported with vPMEM when paprscm probe is being called. The panic is of the form below...