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 --cc crypto/Kconfig
Simple merge

diff --cc crypto/Makefile
Simple merge

diff --cc crypto/crypto_user.c
Simple merge

diff --cc include/linux/cryptouser.h
Simple merge

diff --cc include/linux/netlink.h
Simple merge