clk: qcom: gpucc-qcs615: Add QCS615 graphics clock controller driver

clk: qcom: gpucc-qcs615: Add QCS615 graphics clock controller driver

Add support for the graphics clock controller for graphics clients to
be able to request for the clocks on QCS615 platform.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Taniya Das <quic_tdas@quicinc.com>
Link: https://lore.kernel.org/r/20250702-qcs615-mm-v10-clock-controllers-v11-7-9c216e1615ab@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>