clk: qcom: dispcc-scuba: Add support for DISPCC clock driver

Display clock controller driver for the display clients to be
able to control clocks.

Change-Id: I07d38f0c2d90d7d1f59f35daca857f03e81d6063
Signed-off-by: Naveen Yadav <naveenky@codeaurora.org>