Release deep sleep lock in destructor of Timer class

Release the deep sleep lock when running instances of the Timer class
are deleted. This ensures that deep sleep locks are properly released
by the Timer class.

Author: c1728p9

drivers/Timer.cpp

@@ -28,6 +28,15 @@ Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker
     reset();
 }
 
+Timer::~Timer() {
+    core_util_critical_section_enter();
+    if (_running) {
+        sleep_manager_unlock_deep_sleep();
+    }
+    _running = 0;
+    core_util_critical_section_exit();
+}
+
 void Timer::start() {
     core_util_critical_section_enter();
     if (!_running) {

drivers/Timer.h

@@ -53,6 +53,7 @@ class Timer : private NonCopyable<Timer> {
 public:
     Timer();
     Timer(const ticker_data_t *data);
+    ~Timer();
 
     /** Start the timer
      */