imx: add i.MX8 SoCs OTP SIP(silicon provider) service support

For NXP's i.MX8 SoCs with system controller inside, OTP is
maintained by SCFW, Linux needs to call SMC to trap to TF-A
for OTP read/write etc. operations by calling SCFW API.

This patch adds OTP SIP service support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
3 files changed