The call to cdns3_gadget_ep_free_request will free priv_req so do the
call to list_del_init which accesses the memory pointed to by priv_req
before the free.
This issue was found by Smatch.
Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>