arm64: dts: exynos: set LDO7 regulator as always on

LDO7 regulator beside DSI and HDMI provides power for core blocks in Exynos
5433 SoC. Disabling it causes serious current leak - about 200mA.
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>

arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi

@@ -432,6 +432,10 @@
 				regulator-name = "VDD18_MIPI2L_1.8V_AP";
 				regulator-min-microvolt = <1800000>;
 				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
 			};
 
 			ldo8_reg: LDO8 {