staging: clocking-wizard: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20191009150427.10852-1-yuehaibing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/clocking-wizard/clk-xlnx-clock-wizard.c

@@ -135,7 +135,6 @@ static int clk_wzrd_probe(struct platform_device *pdev)
 	unsigned long rate;
 	const char *clk_name;
 	struct clk_wzrd *clk_wzrd;
-	struct resource *mem;
 	struct device_node *np = pdev->dev.of_node;
 
 	clk_wzrd = devm_kzalloc(&pdev->dev, sizeof(*clk_wzrd), GFP_KERNEL);
@@ -143,8 +142,7 @@ static int clk_wzrd_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	platform_set_drvdata(pdev, clk_wzrd);
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	clk_wzrd->base = devm_ioremap_resource(&pdev->dev, mem);
+	clk_wzrd->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(clk_wzrd->base))
 		return PTR_ERR(clk_wzrd->base);