Add delta auto-calibration and configuration for Flsun AC

Marlin/Conditionals_post.h

@@ -721,6 +721,14 @@
     #ifndef DELTA_TOWER_ANGLE_TRIM_3
       #define DELTA_TOWER_ANGLE_TRIM_3 0.0
     #endif
+    #if ENABLED(DELTA_AUTO_CALIBRATION)
+      #ifndef H_FACTOR
+        #define H_FACTOR 1.00
+      #endif
+      #ifndef R_FACTOR
+        #define R_FACTOR -2.25
+      #endif
+    #endif
   #endif
 
   /**