[ANN] U-Boot v2022.04-rc1 released

Hey all,

It's release day and so here's v2022.04-rc1. While there's much in here that needed to come in, there's a few big things outstanding, including but not limited to i.MX and layerscape syncs and further sunxi changes.

In terms of a changelog, git log --merges v2022.01..v2022.04-rc1 contains what I've pulled but as always, better PR messages and tags will provide better results here.

So we're now looking at regular releases every other Monday, and with final release on April 4th, 2022. Thanks all!