soc: qcom: Add CTI trigger support for DCC

Add support to trigger DCC via CTIs. CTI triggers can be used
to kickstart DCC operation on ceratin HW events.

Change-Id: Ic645f9a615aae4273621c96e9643508b5f723556
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>