[CRYPTO] api: Get rid of flags argument to setkey

Now that the tfm is passed directly to setkey instead of the ctx, we no
longer need to pass the &tfm->crt_flags pointer.

This patch also gets rid of a few unnecessary checks on the key length
for ciphers as the cipher layer guarantees that the key length is within
the bounds specified by the algorithm.

Rather than testing dia_setkey every time, this patch does it only once
during crypto_alloc_tfm.  The redundant check from crypto_digest_setkey
is also removed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/tcrypt.c

@@ -118,10 +118,7 @@ static void test_hash(char *algo, struct hash_testvec *template,
 		sg_set_buf(&sg[0], hash_tv[i].plaintext, hash_tv[i].psize);
 
 		crypto_digest_init(tfm);
-		if (tfm->crt_u.digest.dit_setkey) {
-			crypto_digest_setkey(tfm, hash_tv[i].key,
-					     hash_tv[i].ksize);
-		}
+		crypto_digest_setkey(tfm, hash_tv[i].key, hash_tv[i].ksize);
 		crypto_digest_update(tfm, sg, 1);
 		crypto_digest_final(tfm, result);