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: NMarkus Reichl <m.reichl@fivetechno.de>
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>

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

@@ -30,9 +30,11 @@
 };
 
 &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>;
 };