[U-Boot] [ANN] U-Boot v2017.07-rc1 released

Hey all,

So it's release day and I've put up v2017.07-rc1. The merge window is now closed and I've updated git and the tarballs are also up now.

As is often the case, my queue needs a bit of cleaning up still and as per the schedule, I plan to do -rc2 on the 19th of this month. There's a few changes that should probably come in still that might be a bit disruptive but I think are mostly SoC-centric in their potential to disrupt so I'll likely still pull them in.

I'm also expecting some "big" changes to come in that remove various boards/SoCs that haven't been active in a while and will help make our various migrations a bit easier.

Thanks all!