Fix firmware-retract compile errors (#12061)

Marlin/src/feature/fwretract.cpp

@@ -60,7 +60,9 @@ float FWRetract::current_retract[EXTRUDERS],          // Retract value used by p
       FWRetract::current_hop;
 
 void FWRetract::reset() {
+  #if ENABLED(FWRETRACT_AUTORETRACT)
     autoretract_enabled = false;
+  #endif
   settings.retract_length = RETRACT_LENGTH;
   settings.retract_feedrate_mm_s = RETRACT_FEEDRATE;
   settings.retract_zlift = RETRACT_ZLIFT;

Marlin/src/module/configuration_store.cpp

@@ -697,11 +697,14 @@ void MarlinSettings::postprocess() {
 
       #if ENABLED(FWRETRACT)
         EEPROM_WRITE(fwretract.settings);
-        EEPROM_WRITE(fwretract.autoretract_enabled);
       #else
         const fwretract_settings_t autoretract_defaults = { 3, 45, 0, 0, 0, 13, 0, 8 };
-        const bool autoretract_enabled = false;
         EEPROM_WRITE(autoretract_defaults);
+      #endif
+      #if ENABLED(FWRETRACT) && ENABLED(FWRETRACT_AUTORETRACT)
+        EEPROM_WRITE(fwretract.autoretract_enabled);
+      #else
+        const bool autoretract_enabled = false;
         EEPROM_WRITE(autoretract_enabled);
       #endif
     }
@@ -1311,11 +1314,11 @@ void MarlinSettings::postprocess() {
 
         #if ENABLED(FWRETRACT)
           EEPROM_READ(fwretract.settings);
+        #endif
+        #if ENABLED(FWRETRACT) && ENABLED(FWRETRACT_AUTORETRACT)
           EEPROM_READ(fwretract.autoretract_enabled);
         #else
-          fwretract_settings_t fwretract_settings;
           bool autoretract_enabled;
-          EEPROM_READ(fwretract_settings);
           EEPROM_READ(autoretract_enabled);
         #endif
       }