iommu/omap: Use of_property_read_bool() for boolean properties

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.
Convert reading boolean properties to of_property_read_bool().

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20230310144709.1542980-1-robh@kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/omap-iommu.c

@@ -1191,7 +1191,7 @@ static int omap_iommu_probe(struct platform_device *pdev)
 		return err;
 	if (obj->nr_tlb_entries != 32 && obj->nr_tlb_entries != 8)
 		return -EINVAL;
-	if (of_find_property(of, "ti,iommu-bus-err-back", NULL))
+	if (of_property_read_bool(of, "ti,iommu-bus-err-back"))
 		obj->has_bus_err_back = MMU_GP_REG_BUS_ERR_BACK_EN;
 
 	obj->dev = &pdev->dev;