[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/anubis.c b/crypto/anubis.c
index 7e2e1a2..1c771f7 100644
--- a/crypto/anubis.c
+++ b/crypto/anubis.c
@@ -461,10 +461,11 @@
 };
 
 static int anubis_setkey(struct crypto_tfm *tfm, const u8 *in_key,
-			 unsigned int key_len, u32 *flags)
+			 unsigned int key_len)
 {
 	struct anubis_ctx *ctx = crypto_tfm_ctx(tfm);
 	const __be32 *key = (const __be32 *)in_key;
+	u32 *flags = &tfm->crt_flags;
 	int N, R, i, r;
 	u32 kappa[ANUBIS_MAX_N];
 	u32 inter[ANUBIS_MAX_N];