AP_NavEKF3: correct includes

libraries/AP_NavEKF3/AP_NavEKF3.cpp

@@ -1,3 +1,5 @@
+#include "AP_NavEKF3.h"
+
 #include <AP_HAL/AP_HAL.h>
 
 #include "AP_NavEKF3_core.h"

libraries/AP_NavEKF3/AP_NavEKF3_Measurements.cpp

@@ -1,6 +1,7 @@
-#include <AP_HAL/AP_HAL.h>
-
 #include "AP_NavEKF3_core.h"
+
+#include "AP_NavEKF3.h"
+
 #include <GCS_MAVLink/GCS.h>
 #include <AP_Logger/AP_Logger.h>
 #include <AP_DAL/AP_DAL.h>

libraries/AP_NavEKF3/AP_NavEKF3_VehicleStatus.cpp

@@ -1,6 +1,7 @@
-#include <AP_HAL/AP_HAL.h>
-
 #include "AP_NavEKF3_core.h"
+
+#include "AP_NavEKF3.h"
+
 #include <AP_DAL/AP_DAL.h>
 
 /* Monitor GPS data to see if quality is good enough to initialise the EKF

libraries/AP_NavEKF3/AP_NavEKF3_core.h

@@ -128,7 +128,7 @@ class NavEKF3_core : public NavEKF_core_common
 {
 public:
     // Constructor
-    NavEKF3_core(class NavEKF3 *_frontend, AP_DAL &dal);
+    NavEKF3_core(class NavEKF3 *_frontend, class AP_DAL &dal);
 
     // setup this core backend
     bool setup_core(uint8_t _imu_index, uint8_t _core_index);

libraries/AP_NavEKF3/LogStructure.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <AP_Logger/LogStructure.h>
+#include <AP_AHRS/AP_AHRS_config.h>
 
 #define LOG_IDS_FROM_NAVEKF3 \
     LOG_XKF0_MSG, \