regulator: dts: enable soft-start and ramp delay for the OLinuXino Lime2

The OLinuXino Lime2 has a big capacitor on its LDO3 output. It is
actually too large, causing the PMIC to shutdown when toggling the LDO3.

By enabling soft-start and ramp delay we increase the time for the
capacitor to charge lowering the current drain on the power regulator.
Signed-off-by: NOlliver Schinagl <oliver@schinagl.nl>
Signed-off-by: NPriit Laes <plaes@plaes.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts

@@ -245,6 +245,8 @@ &reg_ldo3 {
 	regulator-min-microvolt = <2800000>;
 	regulator-max-microvolt = <2800000>;
 	regulator-name = "vddio-csi0";
+	regulator-soft-start;
+	regulator-ramp-delay = <1600>;
 };
 
 &reg_ldo4 {