powerpc/smp: do not decrement idle task preempt count in CPU offline
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 v5.14.15 by commit 3ea0b497a7a2fff6a4b7090310c9f52c91975934, it was introduced in version v5.14 by commit 2c669ef6979c370f98d4b876e54f19613c81e075. For more details please see the references link.