arm64: dts: qcom: Add msm8939-pm8916.dtsi include

The msm8939-pm8916.dtsi include configures the regulator supplies of
MSM8939 used together with PM8916, as recommended by Qualcomm. In rare
cases where boards deviate from the recommended design they can just
avoid using this include.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230407194905.611461-4-bryan.odonoghue@linaro.org