dt-bindings: clock: combine qcom,sdm845-gpucc and qcom,sc7180-gpucc

These two bindings are almost identical, so combine them into one. This
will make it easier to add the sm8150 and sm8250 gpucc bindings.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20200709135251.643-7-jonathan@marek.ca


Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>