ARM: dts: sun8i-a83t-tbs-a711: HM5065 doesn't like such a high voltage

Lowering the voltage solves the quick image degradation over time
(minutes), that was probably caused by overheating.
Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts

@@ -374,8 +374,8 @@ &reg_dldo2 {
 };
 
 &reg_dldo3 {
-	regulator-min-microvolt = <2800000>;
-	regulator-max-microvolt = <2800000>;
+	regulator-min-microvolt = <1800000>;
+	regulator-max-microvolt = <1800000>;
 	regulator-name = "vdd-csi";
 };