hwspinlock: stm32: convert to devm_platform_ioremap_resource

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Link: https://lore.kernel.org/r/20191228191541.26999-1-tiny.windzz@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/hwspinlock/stm32_hwspinlock.c

@@ -58,12 +58,10 @@ static int stm32_hwspinlock_probe(struct platform_device *pdev)
 {
 	struct stm32_hwspinlock *hw;
 	void __iomem *io_base;
-	struct resource *res;
 	size_t array_size;
 	int i, ret;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	io_base = devm_ioremap_resource(&pdev->dev, res);
+	io_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(io_base))
 		return PTR_ERR(io_base);