re-applying change

firmware/hw_layer/microsecond_timer.cpp

@@ -189,6 +189,9 @@ static void timerValidationCallback(void *arg) {
  * helps to make sure our GPT hardware settings are somewhat right
  */
 static void validateHardwareTimer() {
+	if (hasFirmwareError()) {
+		return;
+	}
 	testSchedulingStart = currentTimeMillis();
 
 	// to save RAM let's use 'watchDogBuddy' here once before we enable watchdog