gpio: gpio-aspeed-sgpio: Use generic device property APIs

Replace all of_property_read_u32() with device_property_read_u32().
Signed-off-by: NSteven Lee <steven_lee@aspeedtech.com>
Acked-by: NAndrew Jeffery <andrew@aj.id.au>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NBartosz Golaszewski <bgolaszewski@baylibre.com>

drivers/gpio/gpio-aspeed-sgpio.c

@@ -533,13 +533,13 @@ static int __init aspeed_sgpio_probe(struct platform_device *pdev)
 
 	pin_mask = pdata->pin_mask;
 
-	rc = of_property_read_u32(pdev->dev.of_node, "ngpios", &nr_gpios);
+	rc = device_property_read_u32(&pdev->dev, "ngpios", &nr_gpios);
 	if (rc < 0) {
 		dev_err(&pdev->dev, "Could not read ngpios property\n");
 		return -EINVAL;
 	}
 
-	rc = of_property_read_u32(pdev->dev.of_node, "bus-frequency", &sgpio_freq);
+	rc = device_property_read_u32(&pdev->dev, "bus-frequency", &sgpio_freq);
 	if (rc < 0) {
 		dev_err(&pdev->dev, "Could not read bus-frequency property\n");
 		return -EINVAL;