[U-Boot] [ANN] U-Boot v2018.01-rc1 released

Hey all,

So it's release day and I've put up v2018.01-rc1. The merge window is now closed and I've updated git and the tarballs are also up now.

I think my patch queue is in OK shape currently, but I need to pick up a few series once I've had a chance to test them more, and I expect a new EFI PR to come along soon too. Once again, I'm going to otherwise try and be pretty strict about what goes in, and more so as time goes on. I will follow the usual rule of an -rc every other Monday and we're looking at release on Jan 8th, 2018.

Thanks all!