mailbox: tegra-hsp: Convert to devm_platform_ioremap_resource()

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

drivers/mailbox/tegra-hsp.c

@@ -728,7 +728,6 @@ static int tegra_hsp_request_shared_irq(struct tegra_hsp *hsp)
 static int tegra_hsp_probe(struct platform_device *pdev)
 {
 	struct tegra_hsp *hsp;
-	struct resource *res;
 	unsigned int i;
 	u32 value;
 	int err;
@@ -742,8 +741,7 @@ static int tegra_hsp_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&hsp->doorbells);
 	spin_lock_init(&hsp->lock);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hsp->regs = devm_ioremap_resource(&pdev->dev, res);
+	hsp->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(hsp->regs))
 		return PTR_ERR(hsp->regs);