board: sama5d2_xplained: Replace code to set mac address

Replace the code to set the ethernet mac address with the code from
the common folder.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/at91-sama5d2_xplained.dts b/arch/arm/dts/at91-sama5d2_xplained.dts
index 3e624f1..b00aaa2 100644
--- a/arch/arm/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/dts/at91-sama5d2_xplained.dts
@@ -102,6 +102,11 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&pinctrl_i2c1_default>;
 				status = "okay";
+
+				i2c_eeprom: i2c_eeprom@5c {
+					compatible = "atmel,24mac402";
+					reg = <0x5c>;
+				};
 			};
 
 			pioA: gpio@fc038000 {