🩹 MAX Thermocouple followup

Followup to #24898

Marlin/src/inc/Conditionals_LCD.h

 #endif
 
 // Helper macros for extruder and hotend arrays
-#define EXTRUDER_LOOP() for (int8_t e = 0; e < EXTRUDERS; e++)
-#define HOTEND_LOOP() for (int8_t e = 0; e < HOTENDS; e++)
+#define _EXTRUDER_LOOP(E) for (int8_t E = 0; E < EXTRUDERS; E++)
+#define EXTRUDER_LOOP() _EXTRUDER_LOOP(e)
+#define _HOTEND_LOOP(H) for (int8_t H = 0; H < HOTENDS; H++)
+#define HOTEND_LOOP() _HOTEND_LOOP(e)
+
 #define ARRAY_BY_EXTRUDERS(V...) ARRAY_N(EXTRUDERS, V)
 #define ARRAY_BY_EXTRUDERS1(v1) ARRAY_N_1(EXTRUDERS, v1)
 #define ARRAY_BY_HOTENDS(V...) ARRAY_N(HOTENDS, V)

Marlin/src/module/temperature.cpp

   TERN_(HAS_POWER_MONITOR,     power_monitor.capture_values());
 
   #if HAS_HOTEND
-    static constexpr int8_t temp_dir[] = {
+    static constexpr int8_t temp_dir[HOTENDS] = {
       #if TEMP_SENSOR_IS_ANY_MAX_TC(0)
         0
       #else
         #else
           , TEMPDIR(1)
         #endif
+      #endif
+      #if HOTENDS > 2
         #if TEMP_SENSOR_IS_ANY_MAX_TC(2)
           , 0
         #else
           , TEMPDIR(2)
         #endif
-        #if HOTENDS > 3
-          #define _TEMPDIR(N) , TEMPDIR(N)
-          REPEAT_S(3, HOTENDS, _TEMPDIR)
-        #endif
+      #endif
+      #if HOTENDS > 3
+        #define _TEMPDIR(N) , TEMPDIR(N)
+        REPEAT_S(3, HOTENDS, _TEMPDIR)
       #endif
     };
 
-    LOOP_L_N(e, COUNT(temp_dir)) {
+    HOTEND_LOOP() {
       const raw_adc_t r = temp_hotend[e].getraw();
       const bool neg = temp_dir[e] < 0, pos = temp_dir[e] > 0;
       if ((neg && r < temp_range[e].raw_max) || (pos && r > temp_range[e].raw_max))