ARM: dts: exynos: Add missing interrupts property to PMIC on Trats board

PMIC node requires external interrupts for proper operation, but property
defining them was missing. This was probably caused by a limited support
for interrupts from more than one parent, which was not possible to define
when support for this board was added. Fix this by adding
'interrupt-extended' property and properly define interrupt lines for PMIC
node.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/boot/dts/exynos4210-trats.dts

@@ -276,6 +276,7 @@ &i2c_5 {
 
 	max8997_pmic@66 {
 		compatible = "maxim,max8997-pmic";
+		interrupts-extended = <&gpx0 7 0>, <&gpx2 3 0>;
 
 		reg = <0x66>;
 		interrupt-parent = <&gpx0>;