ata: 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: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/ahci_mtk.c

@@ -106,7 +106,7 @@ static int mtk_ahci_parse_property(struct ahci_host_priv *hpriv,
 	struct device_node *np = dev->of_node;
 
 	/* enable SATA function if needed */
-	if (of_find_property(np, "mediatek,phy-mode", NULL)) {
+	if (of_property_present(np, "mediatek,phy-mode")) {
 		plat->mode = syscon_regmap_lookup_by_phandle(
 					np, "mediatek,phy-mode");
 		if (IS_ERR(plat->mode)) {

drivers/ata/libahci_platform.c

@@ -363,7 +363,7 @@ static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
 	switch (rc) {
 	case -ENOSYS:
 		/* No PHY support. Check if PHY is required. */
-		if (of_find_property(node, "phys", NULL)) {
+		if (of_property_present(node, "phys")) {
 			dev_err(dev,
 				"couldn't get PHY in node %pOFn: ENOSYS\n",
 				node);

drivers/ata/sata_dwc_460ex.c

@@ -810,7 +810,7 @@ static int sata_dwc_dma_get_channel(struct sata_dwc_device_port *hsdevp)
 	struct device *dev = hsdev->dev;
 
 #ifdef CONFIG_SATA_DWC_OLD_DMA
-	if (!of_find_property(dev->of_node, "dmas", NULL))
+	if (!of_property_present(dev->of_node, "dmas"))
 		return sata_dwc_dma_get_channel_old(hsdevp);
 #endif
 
@@ -1180,7 +1180,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	}
 
 #ifdef CONFIG_SATA_DWC_OLD_DMA
-	if (!of_find_property(np, "dmas", NULL)) {
+	if (!of_property_present(np, "dmas")) {
 		err = sata_dwc_dma_init_old(ofdev, hsdev);
 		if (err)
 			return err;