ARM: dts: exynos: Add missing used PMIC regulators on Exynos5422 Odroid boards

Define LDO2, LDO23 and LDO27 critical board regulators to describe the
hardware.
Suggested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos5422-odroid-core.dtsi

@@ -154,6 +154,13 @@ ldo1_reg: LDO1 {
 				regulator-always-on;
 			};
 
+			ldo2_reg: LDO2 {
+				regulator-name = "vdd_ldo2";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+			};
+
 			ldo3_reg: LDO3 {
 				regulator-name = "vddq_mmc0";
 				regulator-min-microvolt = <1800000>;
@@ -261,6 +268,13 @@ ldo19_reg: LDO19 {
 				regulator-max-microvolt = <2800000>;
 			};
 
+			ldo23_reg: LDO23 {
+				regulator-name = "vdd_mifs";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-always-on;
+			};
+
 			ldo24_reg: LDO24 {
 				regulator-name = "tsp_io";
 				regulator-min-microvolt = <2800000>;
@@ -275,6 +289,13 @@ ldo26_reg: LDO26 {
 				regulator-always-on;
 			};
 
+			ldo27_reg: LDO27 {
+				regulator-name = "vdd_g3ds";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+			};
+
 			buck1_reg: BUCK1 {
 				regulator-name = "vdd_mif";
 				regulator-min-microvolt = <800000>;