ARM: multi_v7_defconfig: enable Conexant Digicolor platform

This enables the digicolor drivers that are already merged as
part of the multi_v7_defconfig file.

[arnd: change rtc and i2c to loadable modules]

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>