Bring chamber temp to completion (#13837)

Marlin/src/feature/power.cpp

@@ -50,6 +50,10 @@ bool Power::is_power_needed() {
     if (controllerfan_speed) return true;
   #endif
 
+  #if ENABLED(AUTO_POWER_CHAMBER_FAN)
+    if (thermalManager.chamberfan_speed) return true;
+  #endif
+
   // If any of the drivers or the bed are enabled...
   if (X_ENABLE_READ == X_ENABLE_ON || Y_ENABLE_READ == Y_ENABLE_ON || Z_ENABLE_READ == Z_ENABLE_ON
     #if HAS_HEATED_BED