[CRYPTO] padlock: Helper module padlock.ko

Compile a helper module padlock.ko that will try
to autoload all configured padlock algorithms.

This also provides backward compatibility with 
the ancient times before padlock.ko was renamed 
to padlock-aes.ko

Signed-off-by: Michal Ludvig <michal@logix.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/Kconfig

@@ -1,10 +1,10 @@
 menu "Hardware crypto devices"
 
 config CRYPTO_DEV_PADLOCK
-	bool "Support for VIA PadLock ACE"
+	tristate "Support for VIA PadLock ACE"
 	depends on X86_32
 	select CRYPTO_ALGAPI
-	default y
+	default m
 	help
 	  Some VIA processors come with an integrated crypto engine
 	  (so called VIA PadLock ACE, Advanced Cryptography Engine)
@@ -12,8 +12,17 @@ config CRYPTO_DEV_PADLOCK
 	  operations with supported algorithms.
 	  
 	  The instructions are used only when the CPU supports them.
-	  Otherwise software encryption is used. If you are unsure,
-	  say Y.
+	  Otherwise software encryption is used.
+
+	  Selecting M for this option will compile a helper module
+	  padlock.ko that should autoload all below configured
+	  algorithms. Don't worry if your hardware does not support
+	  some or all of them. In such case padlock.ko will
+	  simply write a single line into the kernel log informing
+	  about its failure but everything will keep working fine.
+
+	  If you are unsure, say M. The compiled module will be
+	  called padlock.ko
 
 config CRYPTO_DEV_PADLOCK_AES
 	tristate "PadLock driver for AES algorithm"