[gta02-core] review of PCF50633

[Werner Almesberger]

Rene Harder wrote:
> In the data sheet this pin is described as internal analog decoupling
> node, but the direction is set to bidirectional.
> I would guess that this pin must be passive same as VISC, which is a
> decoupling node as well and already set to passive. Also in the GTA02
> schematics there is a capacitor connected between ground and VISA.

Yes, passive makes more sense. I think it got the BiDi from how
it's switched, but given that REFC and VISC are now Passive, it's
more consistent to make it Passive as well.

I've changed it.

Thanks,
- Werner