ARM: dts: exynos: Use ADC for Exynos4x12 on Exynos4412

Exynos4412 should use "samsung,exynos4212-adc" compatible to report
proper number of (four) channels.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos4412.dtsi

@@ -274,7 +274,7 @@ watchdog: watchdog@10060000 {
 		};
 
 		adc: adc@126c0000 {
-			compatible = "samsung,exynos-adc-v1";
+			compatible = "samsung,exynos4212-adc";
 			reg = <0x126C0000 0x100>;
 			interrupt-parent = <&combiner>;
 			interrupts = <10 3>;