olimexino_stm32: Enable DT usage for OLIMEXINO STM32

This patch adds the necessary changes to enable use of DTS for
generating required build information.

Change-Id: I0d7aa15488339a425ffe57b6354992851212f7f3
Signed-off-by: Yannis Damigos <giannis.damigos@gmail.com>
3 files changed