The new sys_eeprom.c supports both the old CCID EEPROM format and the new NXID
format, and so it obsoletes board/freescale/common/cds_eeprom.c.  Freescale
86xx boards already use sys_eeprom.c, so this patch migrates the remaining
Freescale 85xx boards to use it as well.  cds_eeprom.c is deleted.

Signed-off-by: Timur Tabi <timur@freescale.com>