Input: opencores-kbd - fix error handling

When I was adjusting patch in 848d4793 to
use devm_ioremap_resource() I messed it up.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/opencores-kbd.c

@@ -70,7 +70,7 @@ static int opencores_kbd_probe(struct platform_device *pdev)
 
 	opencores_kbd->addr = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(opencores_kbd->addr))
-		error = PTR_ERR(opencores_kbd->addr);
+		return PTR_ERR(opencores_kbd->addr);
 
 	input->name = pdev->name;
 	input->phys = "opencores-kbd/input0";