soc: fsl: rcpm: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

drivers/soc/fsl/rcpm.c

@@ -146,7 +146,6 @@ static const struct dev_pm_ops rcpm_pm_ops = {
 static int rcpm_probe(struct platform_device *pdev)
 {
 	struct device	*dev = &pdev->dev;
-	struct resource *r;
 	struct rcpm	*rcpm;
 	int ret;
 
@@ -154,11 +153,7 @@ static int rcpm_probe(struct platform_device *pdev)
 	if (!rcpm)
 		return -ENOMEM;
 
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r)
-		return -ENODEV;
-
-	rcpm->ippdexpcr_base = devm_ioremap_resource(&pdev->dev, r);
+	rcpm->ippdexpcr_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(rcpm->ippdexpcr_base)) {
 		ret =  PTR_ERR(rcpm->ippdexpcr_base);
 		return ret;