Pull IOMMU fix from Joerg Roedel:
"Fix a boot crash caused by the VT-d driver when booted with IOMMU
disabled. This was introduced with the recent IOMMU changes"
* tag 'iommu-fix-v4.11-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Fix crash on boot when DMAR is disabled