Mount: use SerialManager for init

libraries/AP_Mount/AP_Mount.cpp

@@ -401,7 +401,7 @@ AP_Mount::AP_Mount(const AP_AHRS &ahrs, const struct Location &current_loc) :
 }
 
 // init - detect and initialise all mounts
-void AP_Mount::init()
+void AP_Mount::init(const AP_SerialManager& serial_manager)
 {
     // check init has not been called before
     if (_num_instances != 0) {
@@ -433,7 +433,7 @@ void AP_Mount::init()
 
         // init new instance
         if (_backends[instance] != NULL) {
-            _backends[instance]->init();
+            _backends[instance]->init(serial_manager);
             if (!primary_set) {
                 _primary = instance;
                 primary_set = true;

libraries/AP_Mount/AP_Mount.h

@@ -28,6 +28,7 @@
 #include <AP_AHRS.h>
 #include <GCS_MAVLink.h>
 #include <RC_Channel.h>
+#include <AP_SerialManager.h>
 
 // maximum number of mounts
 #define AP_MOUNT_MAX_INSTANCES          1
@@ -60,7 +61,7 @@ public:
     AP_Mount(const AP_AHRS &ahrs, const struct Location &current_loc);
 
     // init - detect and initialise all mounts
-    void init();
+    void init(const AP_SerialManager& serial_manager);
 
     // update - give mount opportunity to update servos.  should be called at 10hz or higher
     void update();

libraries/AP_Mount/AP_Mount_Backend.h

@@ -39,7 +39,7 @@ public:
     virtual ~AP_Mount_Backend(void) {}
 
     // init - performs any required initialisation for this instance
-    virtual void init() = 0;
+    virtual void init(const AP_SerialManager& serial_manager) = 0;
 
     // update mount position - should be called periodically
     virtual void update() = 0;