msm: msm_bus: Introduce TCS Query APIs

Introduce new Query API to allow clients who are interested in
managing their own RPMH communication or used by other
execution environment that are unable to generate their own to fetch
sets of TCS commands based on their registered usecases. Bug fix.

Change-Id: I6171a646c6982bf8c781f9bfdbdffb601980d56b
Signed-off-by: David Dai <daidavid1@codeaurora.org>
Signed-off-by: George Shen <sqiao@codeaurora.org>