xfs: return B_OK in xfs_free_dir_cookie() function instead of B_NOT_SUPPORTED

Change-Id: If9fa6deff9057653e7cb717fe9fe6ef1b0964c40
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6401
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

src/add-ons/kernel/file_systems/xfs/kernel_interface.cpp

@@ -467,7 +467,7 @@ static status_t
 xfs_free_dir_cookie(fs_volume *_volume, fs_vnode *_node, void *_cookie)
 {
 	delete (DirectoryIterator*)_cookie;
-	return B_NOT_SUPPORTED;
+	return B_OK;
 }