RC_Channel: standardize inclusion of libaries headers

This commit changes the way libraries headers are included in source files:

 - If the header is in the same directory the source belongs to, so the
 notation '#include ""' is used with the path relative to the directory
 containing the source.

 - If the header is outside the directory containing the source, then we use
 the notation '#include <>' with the path relative to libraries folder.

Some of the advantages of such approach:

 - Only one search path for libraries headers.

 - OSs like Windows may have a better lookup time.

libraries/RC_Channel/RC_Channel.cpp

@@ -23,10 +23,10 @@
 #include <stdlib.h>
 #include <math.h>
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 extern const AP_HAL::HAL& hal;
 
-#include <AP_Math.h>
+#include <AP_Math/AP_Math.h>
 
 #include "RC_Channel.h"
 

libraries/RC_Channel/RC_Channel.h

@@ -6,8 +6,8 @@
 #ifndef __RC_CHANNEL_H__
 #define __RC_CHANNEL_H__
 
-#include <AP_Common.h>
-#include <AP_Param.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Param/AP_Param.h>
 
 #define RC_CHANNEL_TYPE_ANGLE       0
 #define RC_CHANNEL_TYPE_RANGE       1

libraries/RC_Channel/RC_Channel_aux.cpp

@@ -2,8 +2,8 @@
 
 #include "RC_Channel_aux.h"
 
-#include <AP_Math.h>
-#include <AP_HAL.h>
+#include <AP_Math/AP_Math.h>
+#include <AP_HAL/AP_HAL.h>
 extern const AP_HAL::HAL& hal;
 
 const AP_Param::GroupInfo RC_Channel_aux::var_info[] PROGMEM = {

libraries/RC_Channel/RC_Channel_aux.h

@@ -7,7 +7,7 @@
 #ifndef __RC_CHANNEL_AUX_H__
 #define __RC_CHANNEL_AUX_H__
 
-#include <AP_HAL.h>
+#include <AP_HAL/AP_HAL.h>
 #include "RC_Channel.h"
 
 #if HAL_CPU_CLASS > HAL_CPU_CLASS_16

libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp

@@ -11,40 +11,40 @@
 #define CH_7 6
 #define CH_8 7
 
-#include <AP_Common.h>
-#include <AP_Progmem.h>
-#include <AP_HAL.h>
-#include <AP_Param.h>
-#include <StorageManager.h>
-#include <AP_Math.h>
-#include <RC_Channel.h>
-#include <AP_HAL_AVR.h>
-#include <AP_HAL_SITL.h>
-#include <AP_HAL_PX4.h>
-#include <AP_HAL_Empty.h>
-#include <AP_Baro.h>
-#include <AP_ADC.h>
-#include <AP_GPS.h>
-#include <AP_InertialSensor.h>
-#include <AP_Notify.h>
-#include <DataFlash.h>
-#include <GCS_MAVLink.h>
-#include <AP_Mission.h>
-#include <StorageManager.h>
-#include <AP_Terrain.h>
-#include <AP_Compass.h>
-#include <AP_Declination.h>
-#include <SITL.h>
-#include <Filter.h>
-#include <AP_AHRS.h>
-#include <AP_Airspeed.h>
-#include <AP_Vehicle.h>
-#include <AP_ADC_AnalogSource.h>
-#include <AP_NavEKF.h>
-#include <AP_Rally.h>
-#include <AP_Scheduler.h>
+#include <AP_Common/AP_Common.h>
+#include <AP_Progmem/AP_Progmem.h>
+#include <AP_HAL/AP_HAL.h>
+#include <AP_Param/AP_Param.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Math/AP_Math.h>
+#include <RC_Channel/RC_Channel.h>
+#include <AP_HAL_AVR/AP_HAL_AVR.h>
+#include <AP_HAL_SITL/AP_HAL_SITL.h>
+#include <AP_HAL_PX4/AP_HAL_PX4.h>
+#include <AP_HAL_Empty/AP_HAL_Empty.h>
+#include <AP_Baro/AP_Baro.h>
+#include <AP_ADC/AP_ADC.h>
+#include <AP_GPS/AP_GPS.h>
+#include <AP_InertialSensor/AP_InertialSensor.h>
+#include <AP_Notify/AP_Notify.h>
+#include <DataFlash/DataFlash.h>
+#include <GCS_MAVLink/GCS_MAVLink.h>
+#include <AP_Mission/AP_Mission.h>
+#include <StorageManager/StorageManager.h>
+#include <AP_Terrain/AP_Terrain.h>
+#include <AP_Compass/AP_Compass.h>
+#include <AP_Declination/AP_Declination.h>
+#include <SITL/SITL.h>
+#include <Filter/Filter.h>
+#include <AP_AHRS/AP_AHRS.h>
+#include <AP_Airspeed/AP_Airspeed.h>
+#include <AP_Vehicle/AP_Vehicle.h>
+#include <AP_ADC_AnalogSource/AP_ADC_AnalogSource.h>
+#include <AP_NavEKF/AP_NavEKF.h>
+#include <AP_Rally/AP_Rally.h>
+#include <AP_Scheduler/AP_Scheduler.h>
 #include <UARTDriver.h>
-#include <AP_RangeFinder.h>
+#include <AP_RangeFinder/AP_RangeFinder.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;