crypto: user - Add dependency on NET

Since the configuration interface relies on netlink we need to
select NET.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -103,6 +103,7 @@ config CRYPTO_MANAGER2
 config CRYPTO_USER
 	tristate "Userspace cryptographic algorithm configuration"
 	select CRYPTO_MANAGER
+	select NET
 	help
 	  Userapace configuration for cryptographic instantiations such as
 	  cbc(aes).