iommu: Use of_property_present() for testing DT property presence

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20230310144709.1542910-1-robh@kernel.orgSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/arm/arm-smmu/arm-smmu.c

@@ -139,7 +139,7 @@ static int arm_smmu_register_legacy_master(struct device *dev,
 	int err;
 
 	np = dev_get_dev_node(dev);
-	if (!np || !of_find_property(np, "#stream-id-cells", NULL)) {
+	if (!np || !of_property_present(np, "#stream-id-cells")) {
 		of_node_put(np);
 		return -ENODEV;
 	}

drivers/iommu/ipmmu-vmsa.c

@@ -1014,7 +1014,7 @@ static int ipmmu_probe(struct platform_device *pdev)
 	 * the lack of has_cache_leaf_nodes flag or renesas,ipmmu-main property.
 	 */
 	if (!mmu->features->has_cache_leaf_nodes ||
-	    !of_find_property(pdev->dev.of_node, "renesas,ipmmu-main", NULL))
+	    !of_property_present(pdev->dev.of_node, "renesas,ipmmu-main"))
 		mmu->root = mmu;
 	else
 		mmu->root = ipmmu_find_root();