ARM: dts: exynos: Add sysreg phandle to ADC node

Instead of using the ADC_PHY register base address, use sysreg phandle
in ADC node to control ADC_PHY configuration register.

This patch adds syscon node for Exynos3250, Exynos4x12, Exynos5250,
and Exynos5420, Exynos5800.

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
To: linux-samsung-soc@vger.kernel.org
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index 1d52de6..b997a4c 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -272,12 +272,13 @@
 		adc: adc@126C0000 {
 			compatible = "samsung,exynos3250-adc",
 				     "samsung,exynos-adc-v2";
-			reg = <0x126C0000 0x100>, <0x10020718 0x4>;
+			reg = <0x126C0000 0x100>;
 			interrupts = <0 137 0>;
 			clock-names = "adc", "sclk";
 			clocks = <&cmu CLK_TSADC>, <&cmu CLK_SCLK_TSADC>;
 			#io-channel-cells = <1>;
 			io-channel-ranges;
+			samsung,syscon-phandle = <&pmu_system_controller>;
 			status = "disabled";
 		};