Add ms-tpm external component

Add external component for ms-tpm-20-ref repo [1]. The commit contains
patch files for ms-tpm to add MbedTLS backend support, Trusted Services
platform support, and a minimal CMake build system so ms-tpm can be
easily integrated using LazyFetch.

[1] https://github.com/microsoft/ms-tpm-20-ref.git

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: I6d7bff614f4239f97791100508506325d1727580
6 files changed