ci(spm): use SP fragment list with TF-A's SPM

Add the option ARM_BL2_SP_LIST_DTS to include the fragment
for the Trusted Bootloader that relates to the SPs.

This is to automate the process of configuration for
system integrator.

It should resort to SP layout file to speficy the load
address of the SP's package.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I3bdd2cfd6fc43cf7f0dbf96ab09d2be5c301fedf
1 file changed