crypto: add new imx-scc driver ...

The Security Controller (SCC) is found on (at least) i.MX25 SoCs.
It is not a crypto engine in the usual sense. The only supported
algorithm in hardware is 3DES and the key is not configurable, but
is fused in the hardware.

The SCC can be handed some block of data in the red memory space
and it will return the encrypted data in the black memory space and
vice versa.

The API for this driver are the functions

  - mxc_scc_cbc_des_encrypt
  - mxc_scc_cbc_des_decrypt

Along with this driver a blobgen implementation is provided.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

crypto: add i.MX6 CAAM support ...

Add the i.MX6 crypto core CAAM with support for the random number
generator.

The core itself works with jobrings in which descriptors can be
queued/dequeued for processing. Depending on descriptor type
the CAAM unit then either produces random numbers or decrypts/encrypts
data.

The code is based on the Linux v4.1 driver of the same name
without all the crypto/hashing components.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>