crypto: artpec6 - 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 <[e-mail]>
Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/axis/artpec6_crypto.c

···
 	struct artpec6_crypto *ac;
 	struct device *dev = &pdev->dev;
 	void __iomem *base;
-	struct resource *res;
 	int irq;
 	int err;
 
···
 
 	variant = (enum artpec6_crypto_variant)match->data;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);