MLK-23587-2 usb: dwc3: drd: don't free_irq for role switch

As role switch class does not use otg irq like edev, so don't
do free irq for it.

Reviewed-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>

drivers/usb/dwc3/drd.c

@@ -604,6 +604,6 @@ void dwc3_drd_exit(struct dwc3 *dwc)
 		break;
 	}
 
-	if (!dwc->edev)
+	if (!dwc->edev && !dwc->role_switch)
 		free_irq(dwc->otg_irq, dwc);
 }