rockchip: dts: rk3399: rockpro64: Provide init voltage

Add missing regulator-init-microvolt property to vdd_log regulator.
Signed-off-by: NMark Kettenis <kettenis@openbsd.org>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>
(Rebase on latest u-boot-rockchip master)
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>

Change-Id: I13b24fb81e8ad269d7dbb0c7b67f5f4795d2e775

arch/arm/dts/rk3399-rockpro64-u-boot.dtsi

@@ -4,3 +4,7 @@
  */
 
 #include "rk3399-u-boot.dtsi"
+
+&vdd_log {
+	regulator-init-microvolt = <950000>;
+};