Apply maxtemp patch

Marlin/src/lcd/extui/ui_api.cpp

       {
         #if HAS_HOTEND
           const int16_t e = heater - H0;
-          thermalManager.setTargetHotend(LROUND(constrain(value, 0, heater_maxtemp[e] - HOTEND_OVERSHOOT)), e);
+          thermalManager.setTargetHotend(LROUND(constrain(value, 0, thermalManager.heater_maxtemp[e] - HOTEND_OVERSHOOT)), e);
         #endif
       }
   }
     #if HAS_HOTEND
       const int16_t e = extruder - E0;
       enableHeater(extruder);
-      thermalManager.setTargetHotend(LROUND(constrain(value, 0, heater_maxtemp[e] - HOTEND_OVERSHOOT)), e);
+      thermalManager.setTargetHotend(LROUND(constrain(value, 0, thermalManager.heater_maxtemp[e] - HOTEND_OVERSHOOT)), e);
     #endif
   }
 

Marlin/src/lcd/menu/menu_advanced.cpp

     #if ENABLED(PID_AUTOTUNE_MENU)
       #define PID_EDIT_MENU_ITEMS(N) \
         _PID_EDIT_MENU_ITEMS(N); \
-        EDIT_ITEM_FAST_N(int3, N, MSG_PID_AUTOTUNE_E, &autotune_temp[N], 150, heater_maxtemp[N] - HOTEND_OVERSHOOT, []{ _lcd_autotune(MenuItemBase::itemIndex); });
+        EDIT_ITEM_FAST_N(int3, N, MSG_PID_AUTOTUNE_E, &autotune_temp[N], 150, thermalManager.heater_maxtemp[N] - HOTEND_OVERSHOOT, []{ _lcd_autotune(MenuItemBase::itemIndex); });
     #else
       #define PID_EDIT_MENU_ITEMS(N) _PID_EDIT_MENU_ITEMS(N);
     #endif

Marlin/src/lcd/menu/menu_filament.cpp

   BACK_ITEM(MSG_BACK);
   ACTION_ITEM(MSG_PREHEAT_1, []{ _change_filament(ui.preheat_hotend_temp[0]); });
   ACTION_ITEM(MSG_PREHEAT_2, []{ _change_filament(ui.preheat_hotend_temp[1]); });
-  EDIT_ITEM_FAST(int3, MSG_PREHEAT_CUSTOM, &thermalManager.temp_hotend[_change_filament_extruder].target, EXTRUDE_MINTEMP, heater_maxtemp[extruder] - HOTEND_OVERSHOOT, []{
+  EDIT_ITEM_FAST(int3, MSG_PREHEAT_CUSTOM, &thermalManager.temp_hotend[_change_filament_extruder].target, EXTRUDE_MINTEMP, thermalManager.heater_maxtemp[extruder] - HOTEND_OVERSHOOT, []{
     _change_filament(thermalManager.temp_hotend[_change_filament_extruder].target);
   });
   END_MENU();

Marlin/src/lcd/menu/menu_temperature.cpp

 void Temperature::lcd_preheat(const int16_t e, const int8_t indh, const int8_t indb) {
   #if HAS_HOTEND
     if (indh >= 0 && ui.preheat_hotend_temp[indh] > 0)
-      setTargetHotend(_MIN(heater_maxtemp[e] - HOTEND_OVERSHOOT, ui.preheat_hotend_temp[indh]), e);
+      setTargetHotend(_MIN(thermalManager.heater_maxtemp[e] - HOTEND_OVERSHOOT, ui.preheat_hotend_temp[indh]), e);
   #else
-    UNUSED(e);
-    UNUSED(temph);
+    UNUSED(e); UNUSED(indh);
   #endif
   #if HAS_HEATED_BED
     if (indb >= 0 && ui.preheat_bed_temp[indb] > 0) setTargetBed(ui.preheat_bed_temp[indb]);
     EDIT_ITEM_FAST(int3, MSG_NOZZLE, &thermalManager.temp_hotend[0].target, 0, HEATER_0_MAXTEMP - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(0); });
   #elif HAS_MULTI_HOTEND
     HOTEND_LOOP()
-      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &thermalManager.temp_hotend[e].target, 0, heater_maxtemp[e] - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(MenuItemBase::itemIndex); });
+      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &thermalManager.temp_hotend[e].target, 0, thermalManager.heater_maxtemp[e] - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(MenuItemBase::itemIndex); });
   #endif
 
   #if ENABLED(SINGLENOZZLE)

Marlin/src/lcd/menu/menu_tune.cpp

     EDIT_ITEM_FAST(int3, MSG_NOZZLE, &thermalManager.temp_hotend[0].target, 0, HEATER_0_MAXTEMP - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(0); });
   #elif HAS_MULTI_HOTEND
     HOTEND_LOOP()
-      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &thermalManager.temp_hotend[e].target, 0, heater_maxtemp[e] - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(MenuItemBase::itemIndex); });
+      EDIT_ITEM_FAST_N(int3, e, MSG_NOZZLE_N, &thermalManager.temp_hotend[e].target, 0, thermalManager.heater_maxtemp[e] - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(MenuItemBase::itemIndex); });
   #endif
 
   #if ENABLED(SINGLENOZZLE)

Marlin/src/module/temperature.cpp

 
 #if HAS_HOTEND
   hotend_info_t Temperature::temp_hotend[HOTEND_TEMPS]; // = { 0 }
+  const int16_t Temperature::heater_maxtemp[HOTENDS] = ARRAY_BY_HOTENDS(HEATER_0_MAXTEMP, HEATER_1_MAXTEMP, HEATER_2_MAXTEMP, HEATER_3_MAXTEMP, HEATER_4_MAXTEMP, HEATER_5_MAXTEMP, HEATER_6_MAXTEMP, HEATER_7_MAXTEMP);
 #endif
 
 #if ENABLED(AUTO_POWER_E_FANS)

Marlin/src/module/temperature.h

     #if HAS_HOTEND
       #define HOTEND_TEMPS (HOTENDS + ENABLED(TEMP_SENSOR_1_AS_REDUNDANT))
       static hotend_info_t temp_hotend[HOTEND_TEMPS];
-      static constexpr int16_t heater_maxtemp[HOTENDS] = ARRAY_BY_HOTENDS(HEATER_0_MAXTEMP, HEATER_1_MAXTEMP, HEATER_2_MAXTEMP, HEATER_3_MAXTEMP, HEATER_4_MAXTEMP, HEATER_5_MAXTEMP, HEATER_6_MAXTEMP, HEATER_7_MAXTEMP);
+      static const int16_t heater_maxtemp[HOTENDS];
     #endif
     TERN_(HAS_HEATED_BED, static bed_info_t temp_bed);
     TERN_(HAS_TEMP_PROBE, static probe_info_t temp_probe);