profiler: Add a communication interface between userspace and tz services

Add a new driver to Provide a communication interface between userspace and
tz services using Secure Channel Manager (SCM) interface. It exposes APIs
for userspace to get system profiling information.
This will allow the sdp profiler to get cpu/gpu and total bandwidth info.

Change-Id: Ia1f5dbdda44b9e25a0a705ffe827f0c3741c8ef8
Signed-off-by: Jaiju Yesudasan <cjaijuy@codeaurora.org>