power: smb5-lib: Suspend USBIN once moisture detected

Currently, when moisture is detected, all SW does is simply put to
sink mode to prevent fast erosion on CC pins.

There are other concerns with charging safety on phone with moisture, like
observable charger type mis-detections and possible input current overdraw,
etc.

Address it by suspending USBIN (hence charging will be disabled)
on moisture detection.

Change-Id: Ia6092f75c1a5f511e415454d2737024ab62d6072
Signed-off-by: Harry Yang <harryy@codeaurora.org>