Merge https://source.denx.de/u-boot/custodians/u-boot-usb

This is a patchset which makes away with the .bind() controller indexing
workaround which was broken since before v2021.04, and then adds PHY
support and MX8M support on top of that. Better add it into the release
early to get as much testing as possible done, because this really does
a lot of changes to the ehci-mx6 driver.