include: Changes to avoid warnings during compilation

Changes to suppress warnings for enabling Werror flag in LK

Change-Id: I2e5007cfcb7fa75c04b8696efd794bdc6da47ecf
diff --git a/include/dev/gpio.h b/include/dev/gpio.h
index 6e1bce8..50386e9 100644
--- a/include/dev/gpio.h
+++ b/include/dev/gpio.h
@@ -2,6 +2,8 @@
  * Copyright (c) 2008, Google Inc.
  * All rights reserved.
  *
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -26,6 +28,8 @@
  * SUCH DAMAGE.
  */
 
+#include <platform/gpio.h>
+
 #ifndef __DEV_GPIO_H
 #define __DEV_GPIO_H