mtd: rawnand: atmel: switch to using devm_fwnode_gpiod_get()

devm_fwnode_get_index_gpiod_from_child() is going away as the name is
too unwieldy, let's switch to using the new devm_fwnode_gpiod_get().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/raw/atmel/nand-controller.c

@@ -1578,9 +1578,8 @@ static struct atmel_nand *atmel_nand_create(struct atmel_nand_controller *nc,
 
 	nand->numcs = numcs;
 
-	gpio = devm_fwnode_get_index_gpiod_from_child(nc->dev, "det", 0,
-						      &np->fwnode, GPIOD_IN,
-						      "nand-det");
+	gpio = devm_fwnode_gpiod_get(nc->dev, of_fwnode_handle(np),
+				     "det", GPIOD_IN, "nand-det");
 	if (IS_ERR(gpio) && PTR_ERR(gpio) != -ENOENT) {
 		dev_err(nc->dev,
 			"Failed to get detect gpio (err = %ld)\n",
@@ -1624,9 +1623,10 @@ static struct atmel_nand *atmel_nand_create(struct atmel_nand_controller *nc,
 			nand->cs[i].rb.type = ATMEL_NAND_NATIVE_RB;
 			nand->cs[i].rb.id = val;
 		} else {
-			gpio = devm_fwnode_get_index_gpiod_from_child(nc->dev,
-							"rb", i, &np->fwnode,
-							GPIOD_IN, "nand-rb");
+			gpio = devm_fwnode_gpiod_get_index(nc->dev,
+							   of_fwnode_handle(np),
+							   "rb", i, GPIOD_IN,
+							   "nand-rb");
 			if (IS_ERR(gpio) && PTR_ERR(gpio) != -ENOENT) {
 				dev_err(nc->dev,
 					"Failed to get R/B gpio (err = %ld)\n",
@@ -1640,10 +1640,10 @@ static struct atmel_nand *atmel_nand_create(struct atmel_nand_controller *nc,
 			}
 		}
 
-		gpio = devm_fwnode_get_index_gpiod_from_child(nc->dev, "cs",
-							      i, &np->fwnode,
-							      GPIOD_OUT_HIGH,
-							      "nand-cs");
+		gpio = devm_fwnode_gpiod_get_index(nc->dev,
+						   of_fwnode_handle(np),
+						   "cs", i, GPIOD_OUT_HIGH,
+						   "nand-cs");
 		if (IS_ERR(gpio) && PTR_ERR(gpio) != -ENOENT) {
 			dev_err(nc->dev,
 				"Failed to get CS gpio (err = %ld)\n",