dts: generate definitions for build system
dts: generate definitions for build system

This will generate an additional file that can be sourced by the build
system to expose definitions generated by device tree and used for
flashing and debugging targets.

Change-Id: I184e247f0a8dbd1a4a42dd4b02ea01f2caa70533
Jira: ZEP-2119
Signed-off-by: Anas Nashif <0d9952ec84ac43c159f6b7e7ed99a9080c00dd6e@intel.com>

bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr,bigdinotech/zephyr