fix(fsdrv/fatfs): support FF_DIR and FATFS_DIR typedef in ff.h (#6128)

src/libs/fsdrv/lv_fs_fatfs.c

@@ -16,6 +16,10 @@
  *      DEFINES
  *********************/
 
+#ifdef ESP_PLATFORM
+    #define DIR FF_DIR  /* ESP IDF typedefs `DIR` as `FF_DIR` in its version of ff.h. Use `FF_DIR` in LVGL too */
+#endif
+
 #if LV_FS_FATFS_LETTER == '\0'
     #error "LV_FS_FATFS_LETTER must be an upper case ASCII letter"
 #endif