🎨 Define Octopus allocated endstop pins (#22882)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/pins/stm32f4/pins_BTT_OCTOPUS_V1_common.h

 
 //
 // Servos
+//
 #define SERVO0_PIN                          PB6
 
 //
 #define E2_DIAG_PIN                         PG14  // E2DET
 #define E3_DIAG_PIN                         PG15  // E3DET
 
+//
 // Z Probe (when not Z_MIN_PIN)
 //
 #ifndef Z_MIN_PROBE_PIN
 #endif
 
 //
+// Check for additional used endstop pins
+//
+#if HAS_EXTRA_ENDSTOPS
+  #define _ENDSTOP_IS_ANY(ES) X2_USE_ENDSTOP == ES || Y2_USE_ENDSTOP == ES || Z2_USE_ENDSTOP == ES || Z3_USE_ENDSTOP == ES || Z4_USE_ENDSTOP == ES
+  #if _ENDSTOP_IS_ANY(_XMIN_) || _ENDSTOP_IS_ANY(_XMAX_)
+    #define NEEDS_X_MINMAX 1
+  #endif
+  #if _ENDSTOP_IS_ANY(_YMIN_) || _ENDSTOP_IS_ANY(_YMAX_)
+    #define NEEDS_Y_MINMAX 1
+  #endif
+  #if _ENDSTOP_IS_ANY(_ZMIN_) || _ENDSTOP_IS_ANY(_ZMAX_)
+    #define NEEDS_Z_MINMAX 1
+  #endif
+  #undef _ENDSTOP_IS_ANY
+#endif
+
+//
 // Limit Switches
 //
 #ifdef X_STALL_SENSITIVITY
   #else
     #define X_MIN_PIN                E0_DIAG_PIN  // E0DET
   #endif
-#elif EITHER(X_DUAL_ENDSTOPS, DUAL_X_CARRIAGE)
+#elif EITHER(DUAL_X_CARRIAGE, NEEDS_X_MINMAX)
   #ifndef X_MIN_PIN
     #define X_MIN_PIN                 X_DIAG_PIN  // X-STOP
   #endif
   #else
     #define Y_MIN_PIN                E1_DIAG_PIN  // E1DET
   #endif
-#elif ENABLED(Y_DUAL_ENDSTOPS)
+#elif NEEDS_Y_MINMAX
   #ifndef Y_MIN_PIN
     #define Y_MIN_PIN                 Y_DIAG_PIN  // Y-STOP
   #endif
   #else
     #define Z_MIN_PIN                E2_DIAG_PIN  // PWRDET
   #endif
-#elif ENABLED(Z_MULTI_ENDSTOPS)
+#elif NEEDS_Z_MINMAX
   #ifndef Z_MIN_PIN
     #define Z_MIN_PIN                 Z_DIAG_PIN  // Z-STOP
   #endif
   #define Z_STOP_PIN                  Z_DIAG_PIN  // Z-STOP
 #endif
 
+#undef NEEDS_X_MINMAX
+#undef NEEDS_Y_MINMAX
+#undef NEEDS_Z_MINMAX
+
 //
 // Filament Runout Sensor
 //