mfd: various: 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>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230310144712.1543379-1-robh@kernel.org

drivers/mfd/bcm2835-pm.c

@@ -28,7 +28,7 @@ static const struct mfd_cell bcm2835_power_devs[] = {
 static int bcm2835_pm_get_pdata(struct platform_device *pdev,
 				struct bcm2835_pm *pm)
 {
-	if (of_find_property(pm->dev->of_node, "reg-names", NULL)) {
+	if (of_property_present(pm->dev->of_node, "reg-names")) {
 		struct resource *res;
 
 		pm->base = devm_platform_ioremap_resource_byname(pdev, "pm");

drivers/mfd/khadas-mcu.c

@@ -112,7 +112,7 @@ static int khadas_mcu_probe(struct i2c_client *client)
 	if (ret)
 		return ret;
 
-	if (of_find_property(dev->of_node, "#cooling-cells", NULL))
+	if (of_property_present(dev->of_node, "#cooling-cells"))
 		return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
 					    khadas_mcu_fan_cells,
 					    ARRAY_SIZE(khadas_mcu_fan_cells),

drivers/mfd/stmpe.c

@@ -1378,7 +1378,7 @@ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
 
 	stmpe_of_probe(pdata, np);
 
-	if (of_find_property(np, "interrupts", NULL) == NULL)
+	if (!of_property_present(np, "interrupts"))
 		ci->irq = -1;
 
 	stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);