Fix missing start of USB reset

- The start and end of a USB reset is now handled (start mainly to reset the device state & end for getting the current speed)
- Prevents a problem that a USB reset isn't handled when this state is hold for longer

src/portable/synopsys/dwc2/dcd_dwc2.c

@@ -1267,6 +1267,8 @@ void dcd_int_handler(uint8_t rhport)
     // USBRST is start of reset.
     dwc2->gintsts = GINTSTS_USBRST;
     bus_reset(rhport);
+
+    dcd_event_bus_reset(rhport, TUSB_SPEED_INVALID, true);
   }
 
   if(int_status & GINTSTS_ENUMDNE)