ARM: dts: exynos: Add opp-suspend to DMC and leftbus devfreq OPPs on Exynos4

Mark as opp-suspend required devfreq Operating Performance Points to
fix resuming issues on Exynos 4 boards.

The patch is based on earlier work by Tobias Jakobi.
Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Suggested-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos4210.dtsi

@@ -298,6 +298,7 @@ opp-267000000 {
 			opp-400000000 {
 				opp-hz = /bits/ 64 <400000000>;
 				opp-microvolt = <1150000>;
+				opp-suspend;
 			};
 		};
 
@@ -367,6 +368,7 @@ opp-160000000 {
 			};
 			opp-200000000 {
 				opp-hz = /bits/ 64 <200000000>;
+				opp-suspend;
 			};
 		};
 	};

arch/arm/boot/dts/exynos4412.dtsi

@@ -432,6 +432,7 @@ opp-267000000 {
 			opp-400000000 {
 				opp-hz = /bits/ 64 <400000000>;
 				opp-microvolt = <1050000>;
+				opp-suspend;
 			};
 		};
 
@@ -520,6 +521,7 @@ opp-160000000 {
 			opp-200000000 {
 				opp-hz = /bits/ 64 <200000000>;
 				opp-microvolt = <1000000>;
+				opp-suspend;
 			};
 		};