feat(fiptool): add cca, core_swd, plat cert in FIP

Added support for cca CoT in the fiptool by adding the cca,
core_swd, and plat key certificates.

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I1ba559e188ad8c33cb0e643d7a2fc6fb96736ab9
2 files changed