Avoid defining overriding definitions for the RepRapDiscount Smart

Controller. Remove common definitions. Harmonize declaration order.

Marlin/pins.h

 #define FAN_PIN            4 // IO pin. Buffer needed
 #endif
 #define PS_ON_PIN          12
+
+#ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
+#define KILL_PIN           41
+#else
 #define KILL_PIN           -1
+#endif
 
 #define HEATER_0_PIN       10   // EXTRUDER 1
 #if MOTHERBOARD == 33
 #ifdef ULTRA_LCD
 
   #ifdef NEWPANEL
-  //arduino pin which triggers an piezzo beeper
-    #define BEEPER 33			// Beeper on AUX-4
+     //encoder rotation values
+    #define encrot0 0
+    #define encrot1 2
+    #define encrot2 3
+    #define encrot3 1
+
+    #define BLEN_A 0
+    #define BLEN_B 1
+    #define BLEN_C 2
 
     #define LCD_PINS_RS 16 
     #define LCD_PINS_ENABLE 17
     #define LCD_PINS_D6 27
     #define LCD_PINS_D7 29
     
-    //buttons are directly attached using AUX-2
-    #define BTN_EN1 37
-    #define BTN_EN2 35
-    #define BTN_ENC 31  //the click
-    
-    #define BLEN_C 2
-    #define BLEN_B 1
-    #define BLEN_A 0
-    
-    #define SDCARDDETECT -1		// Ramps does not use this port
-    
-      //encoder rotation values
-    #define encrot0 0
-    #define encrot1 2
-    #define encrot2 3
-    #define encrot3 1
-
     #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
-      // Override partially the above definitions
-      #define KILL_PIN 41
-      #define LCD_PINS_RS 16
-      #define LCD_PINS_ENABLE 17
-      #define LCD_PINS_D4 23
-      #define LCD_PINS_D5 25
-      #define LCD_PINS_D6 27
-      #define LCD_PINS_D7 29
+      #define BEEPER 37
 
       #define BTN_EN1 31
       #define BTN_EN2 33
       #define BTN_ENC 35
-      #define BEEPER 37
+
       #define SDCARDDETECT 49
+    #else
+      //arduino pin which triggers an piezzo beeper
+      #define BEEPER 33	 // Beeper on AUX-4
+
+      //buttons are directly attached using AUX-2
+      #define BTN_EN1 37
+      #define BTN_EN2 35
+      #define BTN_ENC 31  //the click
+
+      #define SDCARDDETECT -1  // Ramps does not use this port
     #endif
 
   #else //old style panel with shift register