mtd: rawnand: stm32_fmc2: switch to using devm_fwnode_gpiod_get()

I would like to stop exporting OF-specific devm_gpiod_get_from_of_node()
so that gpiolib can be cleaned a bit, so let's switch to the generic
fwnode property API.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220903-gpiod_get_from_of_node-remove-v1-3-b29adfb27a6c@gmail.com

drivers/mtd/nand/raw/stm32_fmc2_nand.c

@@ -1801,9 +1801,8 @@ static int stm32_fmc2_nfc_parse_child(struct stm32_fmc2_nfc *nfc,
 		nand->cs_used[i] = cs;
 	}
 
-	nand->wp_gpio = devm_gpiod_get_from_of_node(nfc->dev, dn,
-						    "wp-gpios", 0,
-						    GPIOD_OUT_HIGH, "wp");
+	nand->wp_gpio = devm_fwnode_gpiod_get(nfc->dev, of_fwnode_handle(dn),
+					      "wp", GPIOD_OUT_HIGH, "wp");
 	if (IS_ERR(nand->wp_gpio)) {
 		ret = PTR_ERR(nand->wp_gpio);
 		if (ret != -ENOENT)