powerpc/imc-pmu: Fix use of mutex in IRQs disabled section
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 v5.4.229 by commit d0c6d2a31026102d4738b47a610bed4401b9834f, it was introduced in version v4.14 by commit 8f95faaac56c18b32d0e23ace55417a440abdb7e. For more details please see the references link.