linux-imx

security/keys/secure_key: Adds the secure key support based on CAAM.

Secure keys are derieved using CAAM crypto block.

Secure keys derieved are the random number symmetric keys from CAAM.
Blobs corresponding to the key are formed using CAAM. User space
will only be able to view the blob of the key.

Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com>
Reviewed-by: Sahil Malhotra <sahil.malhotra@nxp.com>