driver: crypto: hisilicon: add ECC sign and verify

add ECC sign and verify

Signed-off-by: yuzexi <yuzexi@hisilicon.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

driver: crypto: hisilicon: add ECC gen_keypair and ECDH

add ECC gen_keypair and ECDH

Signed-off-by: Zexi Yu <yuzexi@hisilicon.com>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>