crypto: qcom-rng - use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qcom-rng.c

@@ -153,7 +153,6 @@ static struct rng_alg qcom_rng_alg = {
 
 static int qcom_rng_probe(struct platform_device *pdev)
 {
-	struct resource *res;
 	struct qcom_rng *rng;
 	int ret;
 
@@ -164,8 +163,7 @@ static int qcom_rng_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, rng);
 	mutex_init(&rng->lock);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	rng->base = devm_ioremap_resource(&pdev->dev, res);
+	rng->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(rng->base))
 		return PTR_ERR(rng->base);