se-proxy: Enable compile time service selection

Integrate compile time service selection changes to common se-proxy
components. This enables the feature on the Corstone1000 and fvp-base
platforms.

Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
Change-Id: I26093fb70b423ada8b97eec9cbc620e993baafb8
9 files changed