refactor(arm): add cca CoT certificates to fconf

Adding support in fconf for the cca CoT certificates for cca, core_swd,
and plat key.

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I8019cbcb7ccd4de6da624aebf3611b429fb53f96
2 files changed