crypto: hisilicon - select CRYPTO_SKCIPHER, not CRYPTO_BLKCIPHER

Another instance of CRYPTO_BLKCIPHER made it in just after it was
renamed to CRYPTO_SKCIPHER.  Fix it.

Fixes: 416d8220 ("crypto: hisilicon - add HiSilicon SEC V2 driver")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>