drivers: imx: dcp: disable the use of UNIQUE KEY after HUK generation

Disable the use of DCP unique key (0xfe in the DCP key selection) after
the HUK generation.
The DCP unique key is used to genera

drivers: imx: dcp: disable the use of UNIQUE KEY after HUK generation

Disable the use of DCP unique key (0xfe in the DCP key selection) after
the HUK generation.
The DCP unique key is used to generate the HUK at boot time. Disabling
the use of the unique key prevents the non-secure world from
re-generating the HUK.

Signed-off-by: Clement Faure <clement.faure@nxp.com>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Tested-by: Ricardo Salveti <ricardo@foundries.io> (imx-mx6ullevk)

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drivers: dcp: add DCP support

The Data Co-Processor (DCP) provides hardware acceleraiton for
cryptographic algorithms. The features of DCP are:
- AES128 ECB and CBC
- SHA1, SHA256
- AES128-CMAC a

drivers: dcp: add DCP support

The Data Co-Processor (DCP) provides hardware acceleraiton for
cryptographic algorithms. The features of DCP are:
- AES128 ECB and CBC
- SHA1, SHA256
- AES128-CMAC algorithm
- SRAM key storage
- HUK generation

This driver adds DCP support for the following platforms:
- imx6slevk
- imx6sllevk
- imx6ullevk
- imx6ulzevk

Signed-off-by: Remi Koman <remi.koman@nxp.com>
Signed-off-by: Clement Faure <clement.faure@nxp.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

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