dt-bindings: clock: add QCOM SM8450 camera clock bindings

The change adds device tree bindings for camera clock controller
found on SM8450 SoC.

Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220701062622.2757831-2-vladimir.zapolskiy@linaro.org