[U-Boot] Implement AUART for i.MX28

[Marek Vasut]

> Hi Andreas,
> 
> > I have tried to implement an AUART driver for i.MX28.
> > However for it to work I must print 1 character to the
> > debug UART via the serial_pl01x driver. If I do this
> > the AUART will start working. If I don't nothing will
> > be printed to the AUART. Anybody can see any obvious errors?
> > 
> > Signed-off-by: Andreas Wass <andreas.wass at dalelven.com>
> 
> I have to wonder, is the AUART no standard UART IP ? Probably not as Linux
> also has a separate driver for this ...
> 
> Lots of rambling follows below, but please dont be put off by it.
> 
> Make sure to CC me and Fabio on the next submission. I can help you
> debugging the driver if you clean it up a bit.

Bump, is there any progress here?

Best regards,
Marek Vasut