crypto: arm64/sha2-ce - implement ->digest for sha256
Implement a ->digest function for sha256-ce. This improves the
performance of crypto_shash_digest() with this algorithm by reducing the
number of indirect calls that are made. This only adds ~112 bytes of
code, mostly for the inlined init, as the finup function is tail-called.
For now, don't bother with this for sha224, since sha224 is rarely used.
Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>