Fix: Rework pull-configuration for ehrpwm and eqep based on schematics.

The previous Fix was a mistake!

TB6612 has pull-downs, so disable pulls on all pins going there.

EQEP1 has external pull-downs, so disable pulls there again.
EQEP0,2 and the PRU emulated Encoder should mimic EQEP1 electrical
behaviour, so set pull-downs there.

Signed-off-by: Patrick Menschel <menschel.p@posteo.de>