arm64: dts: qcom: msm8916: Add CPU frequency scaling support

Add a CPU OPP table to allow CPU frequency scaling on msm8916 platforms.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>