ARM: dts: Specify MAX77686 pmic interrupt for exynos5250-smdk5250

The IRQB interrupt pin of MAX77686 PMIC is connected to GPX3[2] pin of
Exynos5250 on the Exynos5250 SMDK board. Specify this connection using
interrupts property for the max77686 pmic node.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5250-smdk5250.dts

@@ -44,6 +44,8 @@
 		max77686@09 {
 			compatible = "maxim,max77686";
 			reg = <0x09>;
+			interrupt-parent = <&gpx3>;
+			interrupts = <2 0>;
 
 			voltage-regulators {
 				ldo1_reg: LDO1 {