After v2015.01 we need to have DM enabled in order to use UART.  Also
fix a typo in the EEPROM config format.

Signed-off-by: Gilles Gameiro <gilles@gigadevices.com>
[trini: Reword commit message, re-save defconfigs with 'savedefconfig']
Signed-off-by: Tom Rini <trini@konsulko.com>