AP_Mount: add HAL_MOUNT_STORMSERIAL_ENABLED build option

libraries/AP_Mount/AP_Mount.cpp

@@ -469,10 +469,12 @@ void AP_Mount::init()
             _num_instances++;
 #endif
 
+#if HAL_MOUNT_STORM32SERIAL_ENABLED
         // check for SToRM32 mounts using serial protocol
         } else if (mount_type == Mount_Type_SToRM32_serial) {
             _backends[instance] = new AP_Mount_SToRM32_serial(*this, state[instance], instance);
             _num_instances++;
+#endif
 
 #if HAL_MOUNT_GREMSY_ENABLED
         // check for Gremsy mounts

libraries/AP_Mount/AP_Mount_SToRM32_serial.cpp

@@ -1,5 +1,6 @@
 #include "AP_Mount_SToRM32_serial.h"
-#if HAL_MOUNT_ENABLED
+
+#if HAL_MOUNT_STORM32SERIAL_ENABLED
 #include <AP_HAL/AP_HAL.h>
 #include <GCS_MAVLink/GCS_MAVLink.h>
 #include <GCS_MAVLink/include/mavlink/v2.0/checksum.h>
@@ -296,4 +297,4 @@ void AP_Mount_SToRM32_serial::parse_reply() {
             break;
     }
 }
-#endif // HAL_MOUNT_ENABLED
+#endif // HAL_MOUNT_STORM32SERIAL_ENABLED

libraries/AP_Mount/AP_Mount_SToRM32_serial.h

@@ -3,14 +3,19 @@
  */
 #pragma once
 
+#include "AP_Mount_Backend.h"
+
+#ifndef HAL_MOUNT_STORM32SERIAL_ENABLED
+#define HAL_MOUNT_STORM32SERIAL_ENABLED HAL_MOUNT_ENABLED
+#endif
+
+#if HAL_MOUNT_STORM32SERIAL_ENABLED
+
 #include <AP_HAL/AP_HAL.h>
 #include <AP_AHRS/AP_AHRS.h>
-
 #include <AP_Math/AP_Math.h>
 #include <AP_Common/AP_Common.h>
 #include <GCS_MAVLink/GCS_MAVLink.h>
-#include "AP_Mount_Backend.h"
-#if HAL_MOUNT_ENABLED
 
 #define AP_MOUNT_STORM32_SERIAL_RESEND_MS   1000    // resend angle targets to gimbal once per second
 
@@ -148,4 +153,4 @@ private:
     // keep the last _current_angle values
     Vector3l _current_angle;
 };
-#endif // HAL_MOUNT_ENABLED
+#endif // HAL_MOUNT_STORM32SERIAL_ENABLED