crypto: allwinner - Remove unused function declarations

Commit 06f751b6 ("crypto: allwinner - Add sun8i-ce Crypto Engine")
declared but never implemented sun8i_ce_enqueue().
Commit 56f6d5ae ("crypto: sun8i-ce - support hash algorithms")
declared but never implemented sun8i_ce_hash().
Commit f08fcced ("crypto: allwinner - Add sun8i-ss cryptographic offloader")
declared but never implemented sun8i_ss_enqueue().

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>