meta-quanta: gbs: fix p12v voltage GAIN and current threshold

1. fix p12v_1/2 input/output voltages GAIN to get the correct value
2. fix p12v_1 output current threshold

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I333c1e5afd1aa0162a4ec46e776294eba0931957
2 files changed