iommu/of: Use device_iommu_mapped()

Use Use device_iommu_mapped() to check if the device is
already mapped by an IOMMU.
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/of_iommu.c

@@ -224,7 +224,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
 	 * If we have reason to believe the IOMMU driver missed the initial
 	 * add_device callback for dev, replay it to get things in order.
 	 */
-	if (ops && ops->add_device && dev->bus && !dev->iommu_group)
+	if (ops && ops->add_device && dev->bus && !device_iommu_mapped(dev))
 		err = ops->add_device(dev);
 
 	/* Ignore all other errors apart from EPROBE_DEFER */