[ANN] U-Boot v2021.10-rc1 released

Hey all,

It's release day, and here's v2021.10-rc1. There's a few more platform pull requests I would like to see come in, but I think we're overall in good shape.

With v2021.10, that means that the migration deadline for DM watchdog will have gone two years past deadline. In this case,

In terms of a changelog, git log --merges v2021.07..v2021.10-rc1 contains what I've pulled but as always, better PR messages and tags will provide better results here.

I do have my reminders setup for doing -rc releases every other Monday from here on out and final release on October 4th, 2021. Thanks all!