Here we do a couple of impovements for all ARC boards as well as introduce yet another developemnt board. 1. Now for ARC boards we print CPU and board info which is useful for users and helps with analysis of logs "post-mortem". 2. Synopsys IoT development kit support is added This one might bw a bit too late as we're past RC1 but: 1) This doesn't affect any other arches etc as we change purely ARC code. 2) I've got a chance to talk about U-Boot on IoT platforms during ELCE (my proposal was on a wait list and only this week I've got an update and invitation to talk) so it would be good to have this board as a primer in upstream code-base by the time of ELCE 2018. 3) For complete support of IoT devkit I'm yet to significantly rework regmap subsystem in U-Boot but that's a different topic and hopefully it will be done sometime soon... though not this release cycle for sure.