add iommu dump script

iommu.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+shopt -s nullglob
+for g in /sys/kernel/iommu_groups/*; do
+    echo "IOMMU Group ${g##*/}:"
+    for d in $g/devices/*; do
+        echo -e "\t$(lspci -nns ${d##*/})"
+    done;
+done;