SPM: Add Non-secure Client extension support

The Non-secure client extension is the interface to the non-secure side
for managing the non-secure client context in TF-M side.
For now, the context is used for the non-secure client ID only.

Signed-off-by: David Wang <david.wang@arm.com>
Change-Id: I374ebb2ee148165a3e1d77665cf39a6941087bb6
2 files changed