soc: qcom: Add configuration support to DCC

Update document for dcc component.Add support to configure DCC during
probe. We will pass the list through device tree. With init time
configuration we can program the DCC early in the boot sequence. This
will help capture debug information if anything goes wrong during boot.

Change-Id: I596ec1aa2594afb83f01342f4436fffd775692b3
Signed-off-by: Mulu He <muluhe@codeaurora.org>