feat(qemu): use mock attestation functions for RME

Since QEMU doesn't yet emulate hardware attestation, provide hardcoded
key and token to demonstrate attestation for RME. They are copied from
the mock values for the FVP platform.

Change-Id: I9ce686955345854e9409af5c3aad2a648adea226
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
3 files changed