msm_otg: hack to allow automatic usb host mode (externally powered)
Force ID_A (host mode + charging) on detection of proprietary charger (Apple-compatible charger with voltage on D+/D-).
Unforce ID_A on PMIC: BSV clear (detection of loss of charger).
Use charger type ACA_DOCK and allow up to 1.5A charge rate in host mode.

Change-Id: I227b6278d16d530d518c501335824c4b19ebe866