crypto: cast5/avx - fix storing of new IV in CBC encryption

cast5/avx incorrectly XORs new IV over old IV at end of CBC encryption
function when it should store. This causes CBC encryption to give
incorrect output on multi-page encryption requests.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/cast5_avx_glue.c

@@ -165,7 +165,7 @@ static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
 		nbytes -= bsize;
 	} while (nbytes >= bsize);
 
-	*(u64 *)walk->iv ^= *iv;
+	*(u64 *)walk->iv = *iv;
 	return nbytes;
 }