arm64: dts: qcom: sm6125-seine: Configure PM6125 regulators

Configure PM6125 regulators based on availability and voltages defined
downstream, to allow powering up (and/or keeping powered) other hardware
blocks going forward.

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221222203636.250190-2-marijn.suijten@somainline.org