ARM: dts: exynos: Add missing CPUs in cooling maps for Odroid X2

While updating cooling maps, the exynos4412-prime.dtsi was left
untouched. This is not a problem with Odroid U3 because it uses its own
map with fan (which was updated). However the cooling maps of Odroid X2
rely only on exynos4412-prime.dtsi.

Signed-off-by: Markus Reichl <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/exynos4412-prime.dtsi

···
 };
 
 &cooling_map0 {
-	cooling-device = <&cpu0 9 9>;
+	cooling-device = <&cpu0 9 9>, <&cpu1 9 9>,
+			 <&cpu2 9 9>, <&cpu3 9 9>;
 };
 
 &cooling_map1 {
-	cooling-device = <&cpu0 15 15>;
+	cooling-device = <&cpu0 15 15>, <&cpu1 15 15>,
+			 <&cpu2 15 15>, <&cpu3 15 15>;
 };