usb: dwc3-msm: Disable proprietary charger detection by default

Proprietary charger detection conflicts with USB 3.0 compliance
mode operation. Add a module parameter to allow enabling it, but
otherwise leave it off by default.

CRs-fixed: 461718
Change-Id: Ia42d4631ca2dc86a6d3bff1ece0cb89db57f4f43
Signed-off-by: Jack Pham <jackp@codeaurora.org>