EHCI: HSIC: Handle remote wake using GPIO

HSIC h/w cannot support auto resume when MDM wakes up
APQ using remote wakeup during vdd minimization. This
can result in phy lockup or device disconnection as HSIC
io pads are not designed to work properly during vdd
minimization. Instead, let MDM indicate remote wakeup using
GPIO for APQ HSIC to resume the bus.

CRs-Fixed: 355600
Change-Id: I9c7a78a1389e11484096243473da44c23c07a3ff
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>