dt-bindings: clock: qcom,gcc-apq8064: move msm8960 compat from gcc-other.yaml

MSM8960 shares the design (and the driver) of the global clock
controller with APQ8064. Move it from clock/qcom,gcc-other.yaml to
clock/qcom,gcc-apq8064.yaml.

As the example in gcc-other.yaml was using qcom,gcc-msm8960 compat string,
change it to qcom,gcc-msm8974.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220521151437.1489111-2-dmitry.baryshkov@linaro.org