Create and export SP layout JSON

Configure a JSON file for each SP and export it to the install dir. The
individual files should be merged by the integrator to form the
SP_LAYOUT_FILE JSON used by TF-A to create the SP packages.

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: I63674e8e584dd3285490f3be51c228718f39a998
3 files changed