[mcu_periph] gpio helper functions

also removed the old gpio1 that was used on lpc and fixedwing firmware

sw/airborne/boards/ardrone/actuators_ardrone2_raw.c

@@ -30,7 +30,7 @@
 
 #include "subsystems/actuators.h"
 #include "actuators_ardrone2_raw.h"
-#include "gpio.h"
+#include "gpio_ardrone.h"
 
 #include <stdio.h>   /* Standard input/output definitions */
 #include <string.h>  /* String function definitions */

sw/airborne/boards/ardrone/gpio_ardrone.c

@@ -18,13 +18,13 @@
  */
 
 /**
- * @file boards/ardrone/gpio.c
+ * @file boards/ardrone/gpio_ardrone.c
  * ardrone GPIO driver
  */
 
 #include <stdio.h>
 #include <stdlib.h>
-#include "gpio.h"
+#include "gpio_ardrone.h"
 
 //val=0 -> set gpio output lo
 //val=1 -> set gpio output hi

sw/airborne/boards/ardrone/gpio_ardrone.h

@@ -18,16 +18,16 @@
  */
 
 /**
- * @file boards/ardrone/gpio.h
+ * @file boards/ardrone/gpio_ardrone.h
  * ardrone GPIO driver
  */
 
-#ifndef GPIO_H
-#define GPIO_H
+#ifndef GPIO_ARDRONE_H
+#define GPIO_ARDRONE_H
 
 //val=0 -> set gpio output lo
 //val=1 -> set gpio output hi
 //val=-1 -> set gpio as input (output hi-Z)
 int gpio_set(int nr,int val);
 
-#endif /* GPIO_H */
+#endif /* GPIO_ARDRONE_H */