[ANN] U-Boot v2021.07-rc2 released

Hey all,

It's release day, and here's v2021.07-rc2. There's a few PRs I do hope to see come in soon, and shortly after this I will pull in the patches needed to enforce the DM migrations that are now 2 years past their warning dates.

I need to start soon on the next round of board removal patches based on the next deadline.

In terms of a changelog, git log --merges v2021.07-rc1..v2021.07-rc2 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 July 5th, 2021. Thanks all!