crypto: padlock - Switch sha to shash

This patch converts the padlock-sha implementation to shash.
In doing so the existing mechanism of storing the data until
final is no longer viable as we do not have a way of allocating
data in crypto_shash_init and then reliably freeing it.

This is just as well because a better way of handling the problem
is to hash everything but the last chunk using normal sha code
and then provide the intermediate result to the padlock device.

This is good enough because the primary application of padlock-sha
is IPsec and there the data is laid out in the form of an hmac
header followed by the rest of the packet.  In essence we can
provide all the data to the padlock as the hmac header only needs
to be hashed once.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -13,7 +13,6 @@ if CRYPTO_HW
 config CRYPTO_DEV_PADLOCK
 	tristate "Support for VIA PadLock ACE"
 	depends on X86 && !UML
-	select CRYPTO_ALGAPI
 	help
 	  Some VIA processors come with an integrated crypto engine
 	  (so called VIA PadLock ACE, Advanced Cryptography Engine)
@@ -39,6 +38,7 @@ config CRYPTO_DEV_PADLOCK_AES
 config CRYPTO_DEV_PADLOCK_SHA
 	tristate "PadLock driver for SHA1 and SHA256 algorithms"
 	depends on CRYPTO_DEV_PADLOCK
+	select CRYPTO_HASH
 	select CRYPTO_SHA1
 	select CRYPTO_SHA256
 	help