USB: OTG: msm: Implement Accessory Charger Adapter (ACA) detection

Accessory Charger Adapter allows a single USB port to be attached to both
a charger and another device at the same time.  USB device when acting as
host does not have to supply VBUS power instead can draw current from
charger port.  USB device when acting as peripheral draw current from
charger port which can supply more than the standard PC.  Different
configurations are detected via Id resistance change.

Change-Id: Id2cc26c31a652eea9edf23aa57b2db9140dddb93
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>