usb: ks_bridge: Add support for autosuspend

ks bridge driver needs to add support for autosuspend
for 9008 PID. This change allows for the device to be
suspended when there is no active traffic, and USB
remote wakeup is used to signal a resume to the host.

CRs-Fixed: 397969
Change-Id: Id4f1083c7f136e027778c1d6b08f3b3a6048f7e7
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>