Currently we preassign gadget endpoints to raw-gadget endpoints during
initialization. Fix resetting this assignment in raw_ioctl_ep_disable(),
otherwise we will get null-ptr-derefs when an endpoint is reenabled.
Signed-off-by: NAndrey Konovalov <andreyknvl@google.com>
Signed-off-by: NFelipe Balbi <balbi@kernel.org>