drm/sun4i: sun8i-hdmi-phy: Use devm_platform_ioremap_resource

The struct resource is not used for anything else, so we can simplify
the code a bit by using the helper function.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220615045543.62813-3-samuel@sholland.org

drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

@@ -675,7 +675,6 @@ static int sun8i_hdmi_phy_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *node = dev->of_node;
 	struct sun8i_hdmi_phy *phy;
-	struct resource res;
 	void __iomem *regs;
 	int ret;
 
@@ -686,13 +685,7 @@ static int sun8i_hdmi_phy_probe(struct platform_device *pdev)
 	phy->variant = of_device_get_match_data(dev);
 	phy->dev = dev;
 
-	ret = of_address_to_resource(node, 0, &res);
-	if (ret) {
-		dev_err(dev, "phy: Couldn't get our resources\n");
-		return ret;
-	}
-
-	regs = devm_ioremap_resource(dev, &res);
+	regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(regs)) {
 		dev_err(dev, "Couldn't map the HDMI PHY registers\n");
 		return PTR_ERR(regs);