ARM: dts: qcom: msm8974: move regulators to board files

The vph-pwr and boost regulators (even if they are unified by design)
are not a property of SoC, so move them to board files.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230928110309.1212221-33-dmitry.baryshkov@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>