WakeupMgr: kinde: use a 90 sec proximity

sometimes my kindle fires the rtc alarm a tad too late so use a more generous timeout

the real fix would be to have validateWakeupAlarmByProximity return differently if the alarm is past or in the future, but i am too lazy

frontend/device/kindle/powerd.lua

@@ -227,7 +227,7 @@ function KindlePowerD:checkUnexpectedWakeup()
     -- then we were woken by user input not our alarm.
     if state ~= "screenSaver" and state ~= "suspended" then return end
 
-    if self.device.wakeup_mgr:isWakeupAlarmScheduled() and self.device.wakeup_mgr:wakeupAction() then
+    if self.device.wakeup_mgr:isWakeupAlarmScheduled() and self.device.wakeup_mgr:wakeupAction(90) then
         logger.info("Kindle scheduled wakeup")
     else
         logger.warn("Kindle unscheduled wakeup")