Fysetc S6 pins / LCD updates (#16830)

Marlin/Configuration_adv.h

   //#define AO_EXP1_PINMAP    // AlephObjects CLCD UI EXP1 mapping
   //#define AO_EXP2_PINMAP    // AlephObjects CLCD UI EXP2 mapping
   //#define CR10_TFT_PINMAP   // Rudolph Riedel's CR10 pin mapping
+  //#define S6_TFT_PINMAP     // FYSETC S6 pin mapping
+
   //#define OTHER_PIN_LAYOUT  // Define pins manually below
   #if ENABLED(OTHER_PIN_LAYOUT)
-    // The pins for CS and MOD_RESET (PD) must be chosen.
+    // Pins for CS and MOD_RESET (PD) must be chosen
     #define CLCD_MOD_RESET  9
     #define CLCD_SPI_CS    10
 

Marlin/src/lcd/extensible_ui/lib/ftdi_eve_touch_ui/compat.h

 #ifdef __MARLIN_FIRMWARE__
   // __MARLIN_FIRMWARE__ exists when compiled within Marlin.
   #include "pin_mappings.h"
+  #undef max
+  #define max(a,b) ((a)>(b)?(a):(b))
+  #undef min
+  #define min(a,b) ((a)<(b)?(a):(b))
 #else
   namespace UI {
     static inline uint32_t safe_millis() {return millis();};

Marlin/src/lcd/extensible_ui/lib/ftdi_eve_touch_ui/pin_mappings.h

  * without adding new pin definitions to the board.
  */
 
+#ifdef S6_TFT_PINMAP
+  #ifndef __MARLIN_FIRMWARE__
+    #error "This pin mapping requires Marlin."
+  #endif
+
+  #define CLCD_SPI_CS         PC7
+  #define CLCD_MOD_RESET      PC6
+#endif
+
 #ifdef CR10_TFT_PINMAP
   #ifndef __MARLIN_FIRMWARE__
     #error "This pin mapping requires Marlin."

Marlin/src/pins/stm32/pins_FYSETC_S6.h

 #endif
 
 //
+// Servos
+//
+#define SERVO0_PIN         PA3
+
+//
 // Limit Switches
 //
 #define X_MIN_PIN          PB14
 #define Z_MAX_PIN          PA3
 
 //
-// Servos
-// share with Z_MAX_PIN
+// Filament Sensor
 //
-#define SERVO0_PIN         PA3
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN   PA1
+#endif
 
 //
 // Steppers
 //#define KILL_PIN           PC5
 
 #define SDSS               PA4
+#define SD_DETECT_PIN  	   PB10
 
 //
 // LCD / Controller
 
     #define BTN_EN1        PC6
     #define BTN_EN2        PC7
-    #define SD_DETECT_PIN  PB10
 
     #define LCD_SDSS       PA4