crypto: sun4i-ss - add the A33 variant of SS

The A33 SS has a difference with all other SS, it give SHA1 digest
directly in BE.
So this patch adds variant support in sun4i-ss.

Fixes: 6298e948

 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator")
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>