ARM: dts: qcom: ipq4019: drop 'regulator' property from SAW2 devices

ARM: dts: qcom: ipq4019: drop 'regulator' property from SAW2 devices

The SAW2 device should describe the regulator constraints rather than
just declaring that it has the regulator.

Drop the 'regulator' property. If/when CPU voltage scaling is
implemented for this platform, proper regulator nodes show be added
instead.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240102-saw2-spm-regulator-v7-21-0472ec237f49@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>