OSX-KVM - May 2021 Batch Update

Changes:

- Fix CPUFAMILY_INTEL_PENRYN patch to support Big Sur 11.3 [thenickdude]

- AMD GPU passthrough notes

scripts/list_iommu_groups.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Source: https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF
+
+shopt -s nullglob
+for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do
+    echo "IOMMU Group ${g##*/}:"
+    for d in $g/devices/*; do
+        echo -e "\t$(lspci -nns ${d##*/})"
+    done;
+done;