CR10_STOCKDISPLAY support in Bigtreetech SKR (#13516)

Marlin/src/pins/pins_BIGTREE_SKR_V1.3.h

@@ -179,6 +179,18 @@
 #if ENABLED(ULTRA_LCD)
   #define BEEPER_PIN        P1_30   // (37) not 5V tolerant
   #define BTN_ENC           P0_28   // (58) open-drain
+
+  #if ENABLED(CR10_STOCKDISPLAY)
+    #define LCD_PINS_RS     P1_22
+
+    #define BTN_EN1         P1_18
+    #define BTN_EN2         P1_20
+
+    #define LCD_PINS_ENABLE P1_23
+    #define LCD_PINS_D4     P1_21
+
+  #else
+
     #define LCD_PINS_RS     P1_19
 
     #define BTN_EN1         P3_26   // (31) J3-2 & AUX-4
@@ -195,6 +207,9 @@
       #define LCD_PINS_D6   P1_22
       #define LCD_PINS_D7   P1_23
     #endif
+
+  #endif
+
 #endif // ULTRA_LCD
 
 //#define USB_SD_DISABLED