ARM: dts: move dp hpd gpio pin to pinctrl_0 for exynos5420 peach_pit

DP Hpd Gpio pin which is "gpx2-6" in Exynos 5420 based peach board,
belongs to Pinctrl_0. It has moved to pinctrl_0 from pinctrl_3.
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -117,6 +117,13 @@ hdmi_hpd_irq: hdmi-hpd-irq {
 		samsung,pin-pud = <1>;
 		samsung,pin-drv = <0>;
 	};
+
+	dp_hpd_gpio: dp_hpd_gpio {
+		samsung,pins = "gpx2-6";
+		samsung,pin-function = <0>;
+		samsung,pin-pud = <3>;
+		samsung,pin-drv = <0>;
+	};
 };
 
 &pinctrl_3 {
@@ -133,13 +140,6 @@ usb301_vbus_en: usb301-vbus-en {
 		samsung,pin-pud = <0>;
 		samsung,pin-drv = <0>;
 	};
-
-	dp_hpd_gpio: dp_hpd_gpio {
-		samsung,pins = "gpx2-6";
-		samsung,pin-function = <0>;
-		samsung,pin-pud = <3>;
-		samsung,pin-drv = <0>;
-	};
 };
 
 &rtc {