extmod/vfs_posix: Use DTTOIF if available to convert type in ilistdir.

extmod/vfs_posix.c

@@ -192,6 +192,9 @@ STATIC mp_obj_t vfs_posix_ilistdir_it_iternext(mp_obj_t self_in) {
         }
 
         #ifdef _DIRENT_HAVE_D_TYPE
+        #ifdef DTTOIF
+        t->items[1] = MP_OBJ_NEW_SMALL_INT(DTTOIF(dirent->d_type));
+        #else
         if (dirent->d_type == DT_DIR) {
             t->items[1] = MP_OBJ_NEW_SMALL_INT(MP_S_IFDIR);
         } else if (dirent->d_type == DT_REG) {
@@ -199,10 +202,12 @@ STATIC mp_obj_t vfs_posix_ilistdir_it_iternext(mp_obj_t self_in) {
         } else {
             t->items[1] = MP_OBJ_NEW_SMALL_INT(dirent->d_type);
         }
+        #endif
         #else
         // DT_UNKNOWN should have 0 value on any reasonable system
         t->items[1] = MP_OBJ_NEW_SMALL_INT(0);
         #endif
+
         #ifdef _DIRENT_HAVE_D_INO
         t->items[2] = MP_OBJ_NEW_SMALL_INT(dirent->d_ino);
         #else