ARM: at91/dt: sama5d4 xplained: add i2c0

Add i2c0 aka twi0 on sama5d4 xplained board.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91-sama5d4_xplained.dts

@@ -88,6 +88,10 @@ m25p80@0 {
 				};
 			};
 
+			i2c0: i2c@f8014000 {
+				status = "okay";
+			};
+
 			macb0: ethernet@f8020000 {
 				phy-mode = "rmii";
 				status = "okay";