tone_alarm move to px4 work queue

src/drivers/tone_alarm/ToneAlarm.cpp

@@ -40,7 +40,8 @@
 #include <px4_time.h>
 
 ToneAlarm::ToneAlarm() :
-	CDev(TONE_ALARM0_DEVICE_PATH)
+	CDev(TONE_ALARM0_DEVICE_PATH),
+	ScheduledWorkItem(px4::wq_configurations::hp_default)
 {
 }
 
@@ -65,7 +66,9 @@ int ToneAlarm::init()
 	ToneAlarmInterface::init();
 
 	_running = true;
-	work_queue(HPWORK, &_work, (worker_t)&ToneAlarm::next_trampoline, this, 0);
+
+	ScheduleNow();
+
 	return OK;
 }
 
@@ -122,13 +125,12 @@ void ToneAlarm::next_note()
 	}
 
 	// Schedule a callback when the note should stop.
-	work_queue(HPWORK, &_work, (worker_t)&ToneAlarm::next_trampoline, this, USEC2TICK(duration));
+	ScheduleDelayed(duration);
 }
 
-void ToneAlarm::next_trampoline(void *argv)
+void ToneAlarm::Run()
 {
-	ToneAlarm *toneAlarm = (ToneAlarm *)argv;
-	toneAlarm->next_note();
+	next_note();
 }
 
 void ToneAlarm::orb_update()
@@ -177,9 +179,6 @@ void ToneAlarm::stop_note()
 	ToneAlarmInterface::stop_note();
 }
 
-
-struct work_s ToneAlarm::_work = {};
-
 /**
  * Local functions in support of the shell command.
  */