ESP8266: Allow auto modem sleep if power off and sleep permitted (#1184)

* Allow modem sleep if power off and sleep permitted

* Only add auto modem sleep handling for ESP8266

* Add comment and remove redundant condition

Co-authored-by: Aircoookie <cschwinne@gmail.com>

wled00/wled.cpp

@@ -84,10 +84,14 @@ void WLED::loop()
 
     handleHue();
     handleBlynk();
-
     yield();
+
     if (!offMode)
       strip.service();
+#ifdef ESP8266
+    else if (!noWifiSleep)
+      delay(1); //required to make sure ESP enters modem sleep (see #1184)
+#endif
   }
   yield();
 #ifdef ESP8266