dts: peach_pit: Add SLP and RST GPIO properties in parade DT node

Now that parade driver supports reading SLP and RST GPIO
from DT, specify the same in parade DT node.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

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

@@ -67,6 +67,8 @@
 	        edp-lvds-bridge@48 {
 	                compatible = "parade,ps8625";
 	                reg = <0x48>;
+			sleep-gpio = <&gpx3 5 GPIO_ACTIVE_HIGH>;
+			reset-gpio = <&gpy7 7 GPIO_ACTIVE_HIGH>;
 	        };
 	};