iommu/amd: Select IOMMU_IOVA for AMD IOMMU

Include the generic IOVA code to make use of it in the AMD
IOMMU driver too.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index ad08603..0b1aabb 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -111,6 +111,7 @@
 	select PCI_PRI
 	select PCI_PASID
 	select IOMMU_API
+	select IOMMU_IOVA
 	depends on X86_64 && PCI && ACPI
 	---help---
 	  With this option you can enable support for AMD IOMMU hardware in