[U-Boot] [RFC 0/4] dm-usb fixes + dm conversion for sunxi-ehci

Hi All,

Here are a couple of dm-usb fixes and the dm conversion for sunxi-ehci, note that this series is currently still RFC only as I'm still having some issues with USB-1 devices not working which I need to investigate further.

I guess that some of the dm-usb fixed can be applied regardless as they are an improvement over the current status quo.

Regards,

Hans