powerpc/xive/spapr: correct bitmap allocation size
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 v5.18.13 by commit 99d1c36bddd93919072b5a51a89297bbb5ad6a6f. For more details please see the references link.