driver: crypto: hisilicon: add montgomery algorithm

add operation of X25519 and X448 algorithm, including alloc_keypair,
gen_keypar and shared_secret

Signed-off-by: yuzexi <yuzexi@hisilicon.com>
Ac

driver: crypto: hisilicon: add montgomery algorithm

add operation of X25519 and X448 algorithm, including alloc_keypair,
gen_keypar and shared_secret

Signed-off-by: yuzexi <yuzexi@hisilicon.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

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