serial-uclass: Fix compilation error

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index fd010ca..6dde4ea 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -198,7 +198,7 @@
 #ifdef CONFIG_SYS_STDIO_DEREGISTER
 	struct serial_dev_priv *upriv = dev->uclass_priv;
 
-	if (stdio_deregister_dev(upriv->sdev), 0)
+	if (stdio_deregister_dev(upriv->sdev, 0))
 		return -EPERM;
 #endif