board: sama5d4_xplained: Set mac address from eeprom

Add the code to set the ethernet mac address from eeprom by using
the common 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-sama5d4_xplained.dts b/arch/arm/dts/at91-sama5d4_xplained.dts
index ca6aff2..0592b31 100644
--- a/arch/arm/dts/at91-sama5d4_xplained.dts
+++ b/arch/arm/dts/at91-sama5d4_xplained.dts
@@ -88,6 +88,11 @@
 
 			i2c0: i2c@f8014000 {
 				status = "okay";
+
+				i2c_eeprom: i2c_eeprom@5c {
+					compatible = "atmel,24mac402";
+					reg = <0x5c>;
+				};
 			};
 
 			macb0: ethernet@f8020000 {