AMD PerfOpt Performance Boosting Code Tweaked For Linux 7.4-rc2

Of the many exciting changes in Linux 7.4, one of the exciting out-of-the-box performance improvements is the new "PerfOpt" functionality for AMD SoCs with integrated Radeon graphics. AMD PerfOpt can deliver some nice iGPU performance improvements especially for AI/LLM workloads. With today's Linux 7.4-rc2 kernel release there are a few tweaks to the PerfOpt code in the IOMMU area...