When specifying multiple fscache related options, the result isn't always
the same as option order, this fix will keep strict consistent meaning
by order.
Signed-off-by: Chengguang Xu <cgxu519@icloud.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>