arm64: dts: qcom: msm8996: add support for speed bin 3

Add support for msm8996, speed bin 3. It supports full range of
frequencies on the power cluster, but is limited to 1.8 GHz on
performance cluster.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220724140421.1933004-6-dmitry.baryshkov@linaro.org