iommu/arm-smmu: Don't unregister on shutdown
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 v6.1.7 by commit a1b9c7b1978aacf4b2f33e34bde1e2bb80b8497a, it was introduced in version v6.1 by commit 57365a04c92126525a58bf7a1599ddfa832415e9. For more details please see the references link.