drivers/video/omap2: don't check resource with devm_ioremap_resource

devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.

Signed-off-by: Wolfram Sang <[e-mail]>

drivers/video/omap2/vrfb.c

···
 	/* first resource is the register res, the rest are vrfb contexts */
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(&pdev->dev, "can't get vrfb base address\n");
-		return -EINVAL;
-	}
-
 	vrfb_base = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(vrfb_base))
 		return PTR_ERR(vrfb_base);