arm: dts: exynos: Add supply for ADC block to Odroid XU3 family

The ADC block requires VDD supply to be on so provide one.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/dts/exynos5422-odroidxu3.dts b/arch/arm/dts/exynos5422-odroidxu3.dts
index e859dd1..9dfae90 100644
--- a/arch/arm/dts/exynos5422-odroidxu3.dts
+++ b/arch/arm/dts/exynos5422-odroidxu3.dts
@@ -32,6 +32,7 @@
 
 	adc@12D10000 {
 		u-boot,dm-pre-reloc;
+		vdd-supply = <&ldo4_reg>;
 		status = "okay";
 	};