staging: emxx_udc: fix loop in _nbu2ss_nuke()

[ Upstream commit e0112a7c ]

The _nbu2ss_ep_done() function calls:

	list_del_init(&req->queue);

which means that the loop will never exit.

Fixes: ca3d253e

 ("Staging: emxx_udc: Iterate list using list_for_each_entry")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YKUd0sDyjm/lkJfJ@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>