pwm: vt8500: Convert to devm_platform_ioremap_resource()

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-vt8500.c

@@ -193,7 +193,6 @@ MODULE_DEVICE_TABLE(of, vt8500_pwm_dt_ids);
 static int vt8500_pwm_probe(struct platform_device *pdev)
 {
 	struct vt8500_chip *chip;
-	struct resource *r;
 	struct device_node *np = pdev->dev.of_node;
 	int ret;
 
@@ -219,8 +218,7 @@ static int vt8500_pwm_probe(struct platform_device *pdev)
 		return PTR_ERR(chip->clk);
 	}
 
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	chip->base = devm_ioremap_resource(&pdev->dev, r);
+	chip->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(chip->base))
 		return PTR_ERR(chip->base);