crypto: hisilicon/sec2 - use crypto_shash_tfm_digest()

Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.

Cc: Zaibo Xu <[e-mail]>
Signed-off-by: Eric Biggers <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/hisilicon/sec2/sec_crypto.c

···
 				 struct crypto_authenc_keys *keys)
 {
 	struct crypto_shash *hash_tfm = ctx->hash_tfm;
-	SHASH_DESC_ON_STACK(shash, hash_tfm);
 	int blocksize, ret;
 
 	if (!keys->authkeylen) {
···
 
 	blocksize = crypto_shash_blocksize(hash_tfm);
 	if (keys->authkeylen > blocksize) {
-		ret = crypto_shash_digest(shash, keys->authkey,
-					  keys->authkeylen, ctx->a_key);
+		ret = crypto_shash_tfm_digest(hash_tfm, keys->authkey,
+					      keys->authkeylen, ctx->a_key);
 		if (ret) {
 			pr_err("hisi_sec2: aead auth digest error!\n");
 			return -EINVAL;