regulator: bd71815: 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>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/20220903-gpiod_get_from_of_node-remove-v1-8-b29adfb27a6c@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/bd71815-regulator.c

@@ -571,11 +571,10 @@ static int bd7181x_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "No parent regmap\n");
 		return -ENODEV;
 	}
-	ldo4_en = devm_gpiod_get_from_of_node(&pdev->dev,
-					      pdev->dev.parent->of_node,
-						 "rohm,vsel-gpios", 0,
-						 GPIOD_ASIS, "ldo4-en");
 
+	ldo4_en = devm_fwnode_gpiod_get(&pdev->dev,
+					dev_fwnode(pdev->dev.parent),
+					"rohm,vsel", GPIOD_ASIS, "ldo4-en");
 	if (IS_ERR(ldo4_en)) {
 		ret = PTR_ERR(ldo4_en);
 		if (ret != -ENOENT)