[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>
diff --git a/crypto/cipher.c b/crypto/cipher.c
index b899eb9..56406a4 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -264,12 +264,12 @@
 {
 	struct cipher_alg *cia = &tfm->__crt_alg->cra_cipher;
 	
+	tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
 	if (keylen < cia->cia_min_keysize || keylen > cia->cia_max_keysize) {
 		tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 		return -EINVAL;
 	} else
-		return cia->cia_setkey(tfm, key, keylen,
-		                       &tfm->crt_flags);
+		return cia->cia_setkey(tfm, key, keylen);
 }
 
 static int ecb_encrypt(struct crypto_tfm *tfm,