crypto: x86/glue_helper - fix storing of new IV in CBC encryption

Glue_helper 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: NJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/glue_helper.c

@@ -110,7 +110,7 @@ static unsigned int __glue_cbc_encrypt_128bit(const common_glue_func_t fn,
 		nbytes -= bsize;
 	} while (nbytes >= bsize);
 
-	u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
+	*(u128 *)walk->iv = *iv;
 	return nbytes;
 }