usb: dwc3: gadget: Clear run/stop irrespective of softconnect

In a scenario, where disconnnect is racing with composition
switch the run/stop bit is not getting cleared from vbus_session
since dwc3_gadget_pullup is waiting for the spinlock to be released.

Fix this by clearing run/stop bit irrespective of softconnect.

Change-Id: Ib2331061043cd20e149d35049587f44769906c89
Signed-off-by: Pratham Pratap <prathampratap@codeaurora.org>