B4860QDS: Enable mac command support

One of the I2C EEPROM is used to store/save and edit mac
addresses of ports.
this patch add required CONFIG to support the same

Signed-off-by: Shaveta Leekha <shaveta@freescale.com>

include/configs/B4860QDS.h

@@ -227,6 +227,7 @@ unsigned long get_board_ddr_clk(void);
 #endif
 
 /* EEPROM */
+#define CONFIG_ID_EEPROM
 #define CONFIG_SYS_I2C_EEPROM_NXID
 #define CONFIG_SYS_EEPROM_BUS_NUM	0
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x57