pwm: renesas-tpu: 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-renesas-tpu.c

@@ -383,7 +383,6 @@ static const struct pwm_ops tpu_pwm_ops = {
 static int tpu_probe(struct platform_device *pdev)
 {
 	struct tpu_device *tpu;
-	struct resource *res;
 	int ret;
 
 	tpu = devm_kzalloc(&pdev->dev, sizeof(*tpu), GFP_KERNEL);
@@ -394,8 +393,7 @@ static int tpu_probe(struct platform_device *pdev)
 	tpu->pdev = pdev;
 
 	/* Map memory, get clock and pin control. */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	tpu->base = devm_ioremap_resource(&pdev->dev, res);
+	tpu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(tpu->base))
 		return PTR_ERR(tpu->base);