clk: qcom: Add display clock controller driver for SM6350

Add support for the display clock controller found on SM6350.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220222011534.3502-2-konrad.dybcio@somainline.org