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

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

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200923160635.28370-2-jonathan@marek.ca


Signed-off-by: Stephen Boyd <sboyd@kernel.org>