cmake: mod_sid

This change adds CMake build support for module/sid

Change-Id: Ib009ea1d8f4438ab41180fa8ee7ad155af86439d
Signed-off-by: Chris Kay <chris.kay@arm.com>
Signed-off-by: Joel Goddard <joel.goddard@arm.com>
Signed-off-by: Girish Pathak <girish.pathak@arm.com>