Add psa ipc attestation to se proxy

Implement attestation client API as psa ipc.

Signed-off-by: Satish Kumar <satish.kumar01@arm.com>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Change-Id: I07f4d0cbc650772c0fd5d972e77699be22af578d
7 files changed