crypto: shash - remove useless crypto_yield() in shash_ahash_digest()

The crypto_yield() in shash_ahash_digest() occurs after the entire
digest operation already happened, so there's no real point.  Remove it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/shash.c

@@ -314,7 +314,6 @@ int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
 		err = crypto_shash_digest(desc, data + offset, nbytes,
 					  req->result);
 		kunmap_atomic(data);
-		crypto_yield(desc->flags);
 	} else
 		err = crypto_shash_init(desc) ?:
 		      shash_ahash_finup(req, desc);