arm64: dts: qcom: qrb2210-rb1: Add regulators

Add and assign RPM regulators coming from PM2250.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230711-topic-rb1_regulator-v1-1-bc4398c35800@linaro.org


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