Add test config for COT_DESC_IN_DTB feature

Added test config to verify the boot when CoT descriptors
are placed in device tree

Change-Id: Ibd10581020f511f1c6cfc2f24d803f9ff7ac4d45
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
2 files changed