ARM: dts: add suspend opp to exynos4412

Mark 800MHz OPP as a suspend opp for Exynos4412 based
boards so effectively cpufreq-dt driver behavior w.r.t.
suspend frequency matches what the old exynos-cpufreq
driver has been doing.

This patch fixes suspend/resume support on Exynos4412 based
Trats2 board and reboot hang on Exynos4412 based Odroid U3
board.

Cc: Thomas Abraham <[email protected]>
Cc: Javier Martinez Canillas <[email protected]>
Cc: Marek Szyprowski <[email protected]>
Cc: Tobias Jakobi <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Kukjin Kim <[email protected]>

arch/arm/boot/dts/exynos4412.dtsi

@@ -98,6 +98,7 @@
 			opp-hz = /bits/ 64 <800000000>;
 			opp-microvolt = <1000000>;
 			clock-latency-ns = <200000>;
+			opp-suspend;
 		};
 		opp07 {
 			opp-hz = /bits/ 64 <900000000>;