Fix lightweight UI hotends display

Marlin/src/lcd/dogm/status_screen_lite_ST7920.h

 
   // Draw the static icons in GDRAM
   draw_gdram_icon(1, 1, nozzle_icon);
-  #if EXTRUDERS == 2
+  #if HOTENDS > 1
     draw_gdram_icon(1,2,nozzle_icon);
     draw_gdram_icon(1,3,bed_icon);
   #else
  * text data (the percentage).
  */
 void ST7920_Lite_Status_Screen::draw_progress_bar(const uint8_t value) {
-  #if EXTRUDERS == 1
+  #if HOTENDS == 1
     // If we have only one extruder, draw a long progress bar on the third line
     const uint8_t top     = 1,         // Top in pixels
                   bottom  = 13,        // Bottom in pixels
   }
 
   // Draw the percentage as text in DDRAM
-  #if EXTRUDERS == 1
+  #if HOTENDS == 1
     set_ddram_address(DDRAM_LINE_3 + 4);
     begin_data();
     write_byte(' ');
 
 void ST7920_Lite_Status_Screen::draw_heat_icon(const bool whichIcon, const bool heating) {
   set_ddram_address(
-    #if EXTRUDERS == 1
+    #if HOTENDS == 1
       DDRAM_LINE_2
     #else
       DDRAM_LINE_3
   void ST7920_Lite_Status_Screen::draw_bed_temp(const int16_t temp, const int16_t target, bool forceUpdate) {
     const bool show_target = target && FAR(temp, target);
     draw_temps(2
-      #if EXTRUDERS > 1
+      #if HOTENDS > 1
         + 1
       #endif
       , temp, target, show_target, display_state.bed_show_target != show_target || forceUpdate
 }
 
 void ST7920_Lite_Status_Screen::draw_print_time(const duration_t &elapsed) {
-  #if EXTRUDERS == 1
+  #if HOTENDS == 1
     set_ddram_address(DDRAM_LINE_3);
   #else
     set_ddram_address(DDRAM_LINE_3 + 5);
 void ST7920_Lite_Status_Screen::draw_feedrate_percentage(const uint16_t percentage) {
   // We only have enough room for the feedrate when
   // we have one extruder
-  #if EXTRUDERS == 1
+  #if HOTENDS == 1
     set_ddram_address(DDRAM_LINE_2 + 6);
     begin_data();
     write_number(percentage, 3);
   const uint16_t   feedrate_perc     = feedrate_percentage;
   const uint8_t    fan_speed         = ((fanSpeeds[0] + 1) * 100) / 256;
   const int16_t    extruder_1_target = thermalManager.degTargetHotend(0);
-  #if EXTRUDERS == 2
+  #if HOTENDS > 1
     const int16_t  extruder_2_target = thermalManager.degTargetHotend(1);
   #endif
   #if HAS_HEATED_BED
   #endif
   static uint16_t last_checksum = 0;
   const uint16_t checksum = blink ^ feedrate_perc ^ fan_speed ^ extruder_1_target
-    #if EXTRUDERS == 2
+    #if HOTENDS > 1
       ^ extruder_2_target
     #endif
     #if HAS_HEATED_BED
     const uint8_t    fan_speed         = ((fanSpeeds[0] + 1) * 100) / 256;
     const int16_t    extruder_1_temp   = thermalManager.degHotend(0),
                      extruder_1_target = thermalManager.degTargetHotend(0);
-    #if EXTRUDERS == 2
+    #if HOTENDS > 1
       const int16_t  extruder_2_temp   = thermalManager.degHotend(1),
                      extruder_2_target = thermalManager.degTargetHotend(1);
     #endif
     #endif
 
     draw_extruder_1_temp(extruder_1_temp, extruder_1_target, forceUpdate);
-    #if EXTRUDERS == 2
+    #if HOTENDS > 1
       draw_extruder_2_temp(extruder_2_temp, extruder_2_target, forceUpdate);
     #endif
     #if HAS_HEATED_BED