iommu/arm-smmu: fix possible null-ptr-deref in armsmmudevice_probe()
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 v5.15.47 by commit 98dd53a92825747395649f54d23512a13c3ed471. For more details please see the references link.