[gta02-core] ECN0010: LDO2/LDO4 swap implemented

[Werner Almesberger]

Rene Harder wrote:
> implemented and moved to done!

Yay, thanks ! I've reviewed it and added the tag.

> added new ECN0042.

Wow, that's really simple. When I discussed the microphone a while ago
with Joerg, he said that, in order to better match the source impedance
specified for the microphone, R4303 and R4305 should be more like the
680 Ohm in GTA01. I suggested 1 kOhm, and he liked that too.

> I rewrote ECN0019 to reflect those changes and reopened it for further
> discussions.

I'll get to this one in a separate mail.

> Are we going to create a new ECN for this?
> Werner mentioned an "Assorted AUDIO cleanup" ECN in a previous email.
> I'm in favor of this idea, there we could add all those change which are
> not worth getting an own ECN (like this one).

Just committed it as ECN0043.

> Added to ECN0033 and implemented change!

Looking good !

Thanks a lot !

- Werner