EXYNOS5: Add device node for PMIC

Add device node for MAX77686

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

board/samsung/dts/exynos5250-smdk5250.dts

@@ -59,4 +59,11 @@
 			compatible = "wolfson,wm8994-codec";
 		};
 	};
+
+	i2c@12c60000 {
+		pmic@9 {
+			reg = <0x9>;
+			compatible = "maxim,max77686_pmic";
+		};
+	};
 };