Add SDCARD_SORT_ALPHA options for LPC1768

Marlin/src/inc/Conditionals_post.h

@@ -1179,10 +1179,22 @@
   #undef SDSORT_USES_RAM
   #undef SDSORT_USES_STACK
   #undef SDSORT_CACHE_NAMES
-  #define SDSORT_LIMIT       256    // Maximum number of sorted items (10-256). Costs 27 bytes each.
-  #define SDSORT_USES_RAM    true   // Pre-allocate a static array for faster pre-sorting.
-  #define SDSORT_USES_STACK  false  // Prefer the stack for pre-sorting to give back some SRAM. (Negated by next 2 options.)
-  #define SDSORT_CACHE_NAMES true   // Keep sorted items in RAM longer for speedy performance. Most expensive option.
+  #define SDSORT_LIMIT       256
+  #define SDSORT_USES_RAM    true
+  #define SDSORT_USES_STACK  false
+  #define SDSORT_CACHE_NAMES true
+  #ifndef FOLDER_SORTING
+    #define FOLDER_SORTING     -1
+  #endif
+  #ifndef SDSORT_GCODE
+    #define SDSORT_GCODE       false
+  #endif
+  #ifndef SDSORT_DYNAMIC_RAM
+    #define SDSORT_DYNAMIC_RAM false
+  #endif
+  #ifndef SDSORT_CACHE_VFATS
+    #define SDSORT_CACHE_VFATS 2
+  #endif
 #endif
 
 #endif // CONDITIONALS_POST_H