Makefile: Add dts config include file

This patch adds a dts config include file that is sourced during builds.
The config file contents are key value pairs derived from the DTS board
descriptions.

Jira: ZEP-2119

Change-Id: I4d50e795ba776645b56f0b83410cbb5b0a8fd4fa
Signed-off-by: Andy Gross <andy.gross@linaro.org>
1 file changed