arm: cm-fx6: add support for eeprom layout comands

Add support for EEPROM and EEPROM layout commands for CM-FX6.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Tom Rini <trini@konsulko.com>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>