With SuperSpeed CDC NCM gadget, net2280 would get stuck in
'handle_ep_small' function. Triggering issue requires large
TCP transfer from host to USB3380.

Patch adds check for stuck condition and prevents hard lockup.
Signed-off-by: NJussi Kivilinna <jussi.kivilinna@haltian.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>