Core: Refine NSPM implementation when NS ID is disabled

There are some codes for NS client ID management compiled even when
TFM_NS_CLIENT_IDENTIFICATION is OFF.
This patch makes those codes optional and also install the nspm
interfaces conditionally.

Change-Id: Ia5d82d5dcdf12510b5c87f3bf400b56e950d4e4c
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
2 files changed