ARM: dts: exynos: Adjust ldo23 and ldo27 to lower levels on Arndale Octa

Although on the schematics of Insignal Arndale Octa board the
PVDD_MIFS_1V1 (ldo23) and PVDD_G3DS_1V0 (ldo27) are marked as 1.2 V, the
vendor v3.4 Android kernel sets them lower.  Also name suggests that
they should work on 1.1 V and 1.0 V respectively, not 1.2 V.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos5420-arndale-octa.dts

@@ -504,8 +504,8 @@ ldo22_reg: LDO22 {
 
 			ldo23_reg: LDO23 {
 				regulator-name = "PVDD_MIFS_1V1";
-				regulator-min-microvolt = <1200000>;
-				regulator-max-microvolt = <1200000>;
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1100000>;
 				regulator-always-on;
 			};
 
@@ -530,8 +530,8 @@ ldo26_reg: LDO26 {
 
 			ldo27_reg: LDO27 {
 				regulator-name = "PVDD_G3DS_1V0";
-				regulator-min-microvolt = <1200000>;
-				regulator-max-microvolt = <1200000>;
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1100000>;
 			};
 
 			ldo28_reg: LDO28 {