refactor(auth): separate bl1 and bl2 CoT

Separate the bl1 and bl2 CoT into individual C files for the
upcoming tool, i.e. the CoT device tree-to-source file generator.

Change-Id: I0d24791991b3539c7aef9a562920dc62fecdc69a
Signed-off-by: Xialin Liu <Xialin.Liu@ARM.com>
5 files changed