clk: qcom: gpucc-scuba: Add support for GPUCC clock driver

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

Change-Id: Iee8c452cbb2a19bf7c09f32f01afee7c42d2c774
Signed-off-by: Naveen Yadav <naveenky@codeaurora.org>