Fix CELL pin setting for charge controller

The BAT_CELL_SEL line (GPIO_J3) needs to be set high and stay high in order for the charge controller to be set properly depending on if a 3-cell or 4-cell battery is installed.

Previously, we tried to set the GPIO properly based on the detected battery type, but since the factory chose the wrong MOSFETs, this approach did not work; to the contrary, it interferes with the resistor modification. By rolling this back to pre-1.6 code, everything works again.

We do have a very slight corner case, where directly after power on (and before the EC firmware sets new value)s the charge controller assumes the wrong values for the 4-cell batteries (IIRC). This should not be a huge problem since we very soon during EC init reset these values according to the battery probe.

Signed-off-by: Nicole Faerber nicole.faerber@puri.sm