Add REPORT_FAN_CHANGE as an option

Marlin/Configuration_adv.h

 //#define M114_REALTIME       // Real current position based on forward kinematics
 //#define M114_LEGACY         // M114 used to synchronize on every call. Enable if needed.
 
+//#define REPORT_FAN_CHANGE   // Report the new fan speed when changed by M106 (and others)
+
 /**
  * Set the number of proportional font spaces required to fill up a typical character space.
  * This can help to better align the output of commands like `G29 O` Mesh Output.

Marlin/src/lcd/menu/menu_temperature.cpp

   // Nozzle [1-5]:
   //
   #if HOTENDS == 1
-    EDIT_ITEM_FAST(int3, MSG_NOZZLE, &thermalManager.temp_hotend[0].target, 0, HEATER_0_MAXTEMP - HOTEND_OVERSHOOT, []{ thermalManager.start_watching_hotend(0); });
+    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, thermalManager.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_STANDBY_TEMP)
     LOOP_S_L_N(e, 1, EXTRUDERS)
-      EDIT_ITEM_FAST_N(uint16_3, e, MSG_NOZZLE_STANDBY, &singlenozzle_temp[e], 0, thermalManager.heater_maxtemp[0] - HOTEND_OVERSHOOT);
+      EDIT_ITEM_FAST_N(uint16_3, e, MSG_NOZZLE_STANDBY, &singlenozzle_temp[e], 0, thermalManager.heater_maxtemp[0] - (HOTEND_OVERSHOOT));
   #endif
 
   //

Marlin/src/module/temperature.cpp

     if (target >= FAN_COUNT) return;
 
     fan_speed[target] = speed;
-    report_fan_speed(target);
-  }
 
-  /**
-   * Report print fan speed for a target extruder
-   */
-  void Temperature::report_fan_speed(const uint8_t target) {
-    if (target >= FAN_COUNT) return;
-    PORT_REDIRECT(SERIAL_BOTH);
-    SERIAL_ECHOLNPAIR("M106 P", target, " S", fan_speed[target]);
+    TERN_(REPORT_FAN_CHANGE, report_fan_speed(target));
   }
 
+  #if ENABLED(REPORT_FAN_CHANGE)
+    /**
+     * Report print fan speed for a target extruder
+     */
+    void Temperature::report_fan_speed(const uint8_t target) {
+      if (target >= FAN_COUNT) return;
+      PORT_REDIRECT(SERIAL_BOTH);
+      SERIAL_ECHOLNPAIR("M106 P", target, " S", fan_speed[target]);
+    }
+  #endif
+
   #if EITHER(PROBING_FANS_OFF, ADVANCED_PAUSE_FANS_PAUSE)
 
     void Temperature::set_fans_paused(const bool p) {

Marlin/src/module/temperature.h

       #define FANS_LOOP(I) LOOP_L_N(I, FAN_COUNT)
 
       static void set_fan_speed(const uint8_t target, const uint16_t speed);
-      static void report_fan_speed(const uint8_t target);
+
+      #if ENABLED(REPORT_FAN_CHANGE)
+        static void report_fan_speed(const uint8_t target);
+      #endif
 
       #if EITHER(PROBING_FANS_OFF, ADVANCED_PAUSE_FANS_PAUSE)
         static bool fans_paused;
 
       static inline uint8_t scaledFanSpeed(const uint8_t target, const uint8_t fs) {
         UNUSED(target); // Potentially unused!
-        return (fs * uint16_t(
-          #if ENABLED(ADAPTIVE_FAN_SLOWING)
-            fan_speed_scaler[target]
-          #else
-            128
-          #endif
-        )) >> 7;
+        return (fs * uint16_t(TERN(ADAPTIVE_FAN_SLOWING, fan_speed_scaler[target], 128))) >> 7;
       }
 
       static inline uint8_t scaledFanSpeed(const uint8_t target) {
       static void setTargetBed(const int16_t celsius) {
         TERN_(AUTO_POWER_CONTROL, powerManager.power_on());
         temp_bed.target =
-          #ifdef BED_MAXTEMP
+          #ifdef BED_MAX_TARGET
             _MIN(celsius, BED_MAX_TARGET)
           #else
             celsius
 
     #define HAS_MAX6675 EITHER(HEATER_0_USES_MAX6675, HEATER_1_USES_MAX6675)
     #if HAS_MAX6675
-      #if BOTH(HEATER_0_USES_MAX6675, HEATER_1_USES_MAX6675)
-        #define COUNT_6675 2
-      #else
-        #define COUNT_6675 1
-      #endif
+      #define COUNT_6675 1 + BOTH(HEATER_0_USES_MAX6675, HEATER_1_USES_MAX6675)
       #if COUNT_6675 > 1
         #define READ_MAX6675(N) read_max6675(N)
       #else