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 <[e-mail]>
Suggested-by: Chanwoo Choi <[e-mail]>
Reviewed-by: Chanwoo Choi <[e-mail]>
Signed-off-by: Lukasz Luba <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/exynos4210.dtsi

···
 			opp-400000000 {
 				opp-hz = /bits/ 64 <400000000>;
 				opp-microvolt = <1150000>;
+				opp-suspend;
 			};
 		};
 
···
 			};
 			opp-200000000 {
 				opp-hz = /bits/ 64 <200000000>;
+				opp-suspend;
 			};
 		};
 	};

arch/arm/boot/dts/exynos4412.dtsi

···
 			opp-400000000 {
 				opp-hz = /bits/ 64 <400000000>;
 				opp-microvolt = <1050000>;
+				opp-suspend;
 			};
 		};
 
···
 			opp-200000000 {
 				opp-hz = /bits/ 64 <200000000>;
 				opp-microvolt = <1000000>;
+				opp-suspend;
 			};
 		};