dwc3-msm: Use pm_runtime_put_sync_suspend()

With data role swap (e.g. UFP -> DFP), USB doesn't go into LPM
while stopping UFP mode. This results into no enumeration of
connected USB device in DFP mode.
pm_runtime_put_sync() performs 2 operations:
a. rpm_idle()
b. rpm_suspend() with rpmflags set with AUTO

USB device sets use_autosuspend to true with its power device.
Hence rpm_suspend() exits with updating pm_suspend_timer_fn()
to suspend device in future time. USB driver does have requirement
to make sure that USB always goes through LPM whenever there is
data role change. Hence replace usage of pm_runtime_put_sync()
by pm_runtime_sync_suspend() which calls USB driver suspend
functionality without considering autosuspend flag.

Change-Id: Ie4fff17376626ec27e07af7ee6e22c59ba0c00fb
Signed-off-by: Mayank Rana <mrana@codeaurora.org>