qcom: scm: Provide an API that restores security configuration

Drivers require an API to be able to inform the secure world
that their devices have resumed from power collapse and security
settings need to be re-relaxed.

Transition existing users to the new API.

Change-Id: Ia5b49176c797ec9d6d35350ea98964203d622516
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>