platform: msm: Add snapshot of GPIO-based USB detection driver

This patch adds the GPIO USB detect driver as of msm-3.14 commit
e016c39467094409c9c872b02ec619164913054a ("Merge "msm: thermal: Fix
compilation issue when THERMAL_MONITOR is disabled"").

This driver was previously prefixed as QPNP, but as it does not
really tie in to Qualcomm Technologies' PMIC architectures at all,
rename it to a more generic 'gpio-usbdetect'.

Change-Id: Id86523f587d1684d4ff496ef6fb5b1fca48fda75
Signed-off-by: Jack Pham <jackp@codeaurora.org>