[CRYPTO] geode: do not copy the IV too often

There is no reason to keep the IV in the private structre. Instead keep
just a pointer to make the patch smaller :)
This also remove a few memcpy()s

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/geode-aes.h

@@ -65,7 +65,7 @@ struct geode_aes_op {
 	int len;
 
 	u8 key[AES_KEY_LENGTH];
-	u8 iv[AES_IV_LENGTH];
+	u8 *iv;
 
 	union {
 		struct crypto_blkcipher *blk;