Add generic threat model

The added threat model analyzes threats of a generalized trusted service.
It can be used to support secure development by listing threats and
mitigation options.
For specific setups creation of a use-case focused threat model is
advised. Such threat modelling activity can use the generic model as
a baseline.

Change-Id: I2e0153989a69f8b0a749ed5e700b3ecbb2d09eed
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
5 files changed