u-boot fix to charge empty battery

[Werner Almesberger]

Philipp Hug wrote:
> After some more experimenting I found out, that when the neo is started
> by plugging in USB power it sometimes generates a lowsys interrupt and
> starts the shutdown-timer and shuts down after 8s.

That's a nasty one ! But certainly explains the behaviour without
invoking metaphysics :-)

> To work around this I set the totrst to 1 in the OOCSHDWN register, now
> it didn't shut down after 8s anymore.

Excellent ! Eagerly awaiting your patch ;-)

Thanks a lot !

- Werner