platform: msm_shared: Add secapp loader

Secapp loader loads the tz app via the qseecom api.
Previously this was done in rpmb code and with this change
the secapp code is decoupled as it needs to be run even when
rpmb is disabled.

Change-Id: I4499a01c1015cee0cebd9b3544293aa973699185
3 files changed