fix(sleep): use pm_power_state_force for proper device power management

app/src/activity.c

@@ -68,9 +68,9 @@ void activity_work_handler(struct k_work *work) {
     int32_t inactive_time = current - activity_last_uptime;
 #if IS_ENABLED(CONFIG_ZMK_SLEEP)
     if (inactive_time > MAX_SLEEP_MS && !is_usb_power_present()) {
-        // Put devices in low power mode before sleeping
+        // Put devices in suspend power mode before sleeping
         set_state(ZMK_ACTIVITY_SLEEP);
-        pm_power_state_set((struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});
+        pm_power_state_force(0U, (struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});
     } else
 #endif /* IS_ENABLED(CONFIG_ZMK_SLEEP) */
         if (inactive_time > MAX_IDLE_MS) {

app/src/ext_power_generic.c

@@ -176,10 +176,10 @@ static int ext_power_generic_init(const struct device *dev) {
 #ifdef CONFIG_PM_DEVICE
 static int ext_power_generic_pm_action(const struct device *dev, enum pm_device_action action) {
     switch (action) {
-    case PM_DEVICE_ACTION_TURN_ON:
+    case PM_DEVICE_ACTION_RESUME:
         ext_power_generic_enable(dev);
         return 0;
-    case PM_DEVICE_ACTION_TURN_OFF:
+    case PM_DEVICE_ACTION_SUSPEND:
         ext_power_generic_disable(dev);
         return 0;
     default: