Followup to endstops tweaks

Marlin/src/lcd/ultralcd.cpp

         #if BUTTON_EXISTS(EN1)
           if (BUTTON_PRESSED(EN1)) newbutton |= EN_A;
         #endif
-
         #if BUTTON_EXISTS(EN2)
           if (BUTTON_PRESSED(EN2)) newbutton |= EN_B;
         #endif
-
         #if BUTTON_EXISTS(ENC)
           if (BUTTON_PRESSED(ENC)) newbutton |= EN_C;
         #endif

Marlin/src/lcd/ultralcd.h

     #define REPRAPWORLD_KEYPAD_MOVE_HOME    (buttons_reprapworld_keypad & KEYPAD_HOME)
     #define REPRAPWORLD_KEYPAD_MOVE_MENU    (buttons_reprapworld_keypad & KEYPAD_EN_C)
 
-    #if BUTTON_EXISTS(ENC)
-      #define LCD_CLICKED ((buttons & EN_C) || REPRAPWORLD_KEYPAD_MOVE_MENU)
-    #else
-      #define LCD_CLICKED REPRAPWORLD_KEYPAD_MOVE_MENU
-    #endif
-
     #define REPRAPWORLD_KEYPAD_PRESSED      (buttons_reprapworld_keypad & ( \
                                               EN_REPRAPWORLD_KEYPAD_F3 | \
                                               EN_REPRAPWORLD_KEYPAD_F2 | \
                                               EN_REPRAPWORLD_KEYPAD_LEFT) \
                                             )
 
-  #elif defined(EN_C)
-
-    #define LCD_CLICKED (buttons & EN_C)
-
-  #else
-
-    #define LCD_CLICKED false
-
   #endif
 
   #if ENABLED(AUTO_BED_LEVELING_UBL) || ENABLED(G26_MESH_VALIDATION)
 
 #endif
 
+#if ENABLED(REPRAPWORLD_KEYPAD)
+  #ifdef EN_C
+    #define LCD_CLICKED ((buttons & EN_C) || REPRAPWORLD_KEYPAD_MOVE_MENU)
+  #else
+    #define LCD_CLICKED REPRAPWORLD_KEYPAD_MOVE_MENU
+  #endif
+#elif defined(EN_C)
+  #define LCD_CLICKED (buttons & EN_C)
+#else
+  #define LCD_CLICKED false
+#endif
+
 #define LCD_MESSAGEPGM(x)      lcd_setstatusPGM(PSTR(x))
 #define LCD_ALERTMESSAGEPGM(x) lcd_setalertstatusPGM(PSTR(x))