USB: dwc3-msm: clear in_restart flag always in restart work

Currenlty driver is clearing mdwc->inrestart flag only if vbus_active
is high only after making sure USB entered low power mode. There is a
chance cable is disconnected during execution of restart work and endup
not clearing mdwc->in_restart flag if disconnect happens. Hence fix this
by clearing mdwc->in_restart flag always irrespective of vbus_active set
or cleared.

Change-Id: I15fa1893c798946c7514bf8cb23773b5784e671e
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>