Update hcd-ehci, dcd-dwc2 and examples.

1. Add some example Msh commands.
2. Fix device enumeration on EXT hub.
3. Re-file some templates.
4. Extend end-point number of dwc2 device driver.
5. Re-file rndis_host implementation includes
   a. rt_mutex_take in ISR
   b. 2rd pmsg is unaligned issue.
   c. destroy u0 ethernet resource after removing dongle.

port/ehci/usb_hc_ehci.c

@@ -1151,7 +1151,7 @@ int usbh_submit_urb(struct usbh_urb *urb)
 
     pipe = urb->pipe;
 
-    if (!pipe->inuse || !(EHCI_HCOR->portsc[0] & EHCI_PORTSC_CCS) || !pipe->hport->connected) {
+    if (!pipe->inuse /*|| !(EHCI_HCOR->portsc[pipe->hport->port-1] & EHCI_PORTSC_CCS)*/ || !pipe->hport->connected) {
         return -ENODEV;
     }