crypto: picoxcell - 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>
Acked-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/picoxcell_crypto.c

@@ -1624,7 +1624,7 @@ MODULE_DEVICE_TABLE(of, spacc_of_id_table);
 static int spacc_probe(struct platform_device *pdev)
 {
 	int i, err, ret;
-	struct resource *mem, *irq;
+	struct resource *irq;
 	struct device_node *np = pdev->dev.of_node;
 	struct spacc_engine *engine = devm_kzalloc(&pdev->dev, sizeof(*engine),
 						   GFP_KERNEL);
@@ -1653,8 +1653,7 @@ static int spacc_probe(struct platform_device *pdev)
 
 	engine->name = dev_name(&pdev->dev);
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	engine->regs = devm_ioremap_resource(&pdev->dev, mem);
+	engine->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(engine->regs))
 		return PTR_ERR(engine->regs);