iommu: Make sure DOMAIN_ATTR_MAX is really the maximum

Move it to the end of the list.
Signed-off-by: Joerg Roedel <joro@8bytes.org>

include/linux/iommu.h

@@ -58,8 +58,8 @@ struct iommu_domain {
 #define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */
 
 enum iommu_attr {
-	DOMAIN_ATTR_MAX,
 	DOMAIN_ATTR_GEOMETRY,
+	DOMAIN_ATTR_MAX,
 };
 
 #ifdef CONFIG_IOMMU_API