Misc: sram: Remove unneeded check

Patch removes unneeded check for resource since
devm_ioremap_resource do all for us.

Signed-off-by: Alexander Shiyan <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/sram.c

···
 	int ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -EINVAL;
-
-	size = resource_size(res);
-
 	virt_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(virt_base))
 		return PTR_ERR(virt_base);
 
+	size = resource_size(res);
 
 	sram = devm_kzalloc(&pdev->dev, sizeof(*sram), GFP_KERNEL);
 	if (!sram)