crypto: Add userspace configuration API

This patch adds a basic userspace configuration API for the crypto layer.
With this it is possible to instantiate, remove and to show crypto
algorithms from userspace.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 404a846..a8442dca 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -100,6 +100,13 @@
 	select CRYPTO_BLKCIPHER2
 	select CRYPTO_PCOMP2
 
+config CRYPTO_USER
+	tristate "Userspace cryptographic algorithm configuration"
+	select CRYPTO_MANAGER
+	help
+	  Userapace configuration for cryptographic instantiations such as
+	  cbc(aes).
+
 config CRYPTO_MANAGER_DISABLE_TESTS
 	bool "Disable run-time self tests"
 	default y