cs: let each driver manage the clk for its device

Each device driver manages its own clk by using the clk apis that
now support CoreSight clock. Remove qdss clock wrapper functions
and their usage.

Change-Id: If73198f273f69e5525a6444e7a7c277c20c96111
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>