cl-som-imx7: Enable CMD_EEPROM

This platform defines everything needed to be able to use the
eeprom command.  In addition, board/compulab/common/eeprom.c is required
by the platform, and does not use CONFIG_ID_EEPROM to enable/disable
builing of it.  In order to migrate CONFIG symbols to Kconfig and to not
have to add complex logic to handle this case, enable CMD_EEPROM on this
board.

Cc: Uri Mashiach <uri.mashiach@compulab.co.il>
Signed-off-by: Tom Rini <trini@konsulko.com>