coresight: Add regulator and clock vote for coresight components

Some coresight components are driven by external regulators and
clocks. Add regulator and clock support in coresight driver so
proper regulators and clocks are voted when components are enabled.

Change-Id: I23e2516c4cb077099dab7cedaacad4aba0b962c6
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>