usb: dwc3: Fix incorrect ep0 state on reset

According to the databook ep0 should be in setup
phase during reset. If host issues reset between
control transfers, ep0 will be  in an invalid state.
Fix this my issuing stall and restart on ep0 if it
is not in setup phase.

CRs-Fixed: 2136658
Change-Id: I6dc20c2735a6ce772533ccb5b63ba5d1b01f89d7
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>