refactor(spm): use tf-a fvp-spm build config

This patch changes the configurations under spm-l1-build-tests
to refer to tf-a build config 'fvp-spm'.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ibe1ed1d5bb11c9025389d3f9cc568515116de4ab
4 files changed