powerpc/idle: Don't corrupt back chain when going idle
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 v5.10.76 by commit c5c2a80368e97ac179d6a101c99f1e1f36146ec2, it was introduced in version v5.10.76 by commit fbd724c49bead048ae9fc1a5b7bff2fb3e54f855. For more details please see the references link.