usb: usbtest: fix NULL pointer dereference

usb: usbtest: fix NULL pointer dereference

If the usbtest driver encounters a device with an IN bulk endpoint but
no OUT bulk endpoint, it will try to dereference a NULL pointer
(out->desc.bEndpointAddress).  The problem can be solved by adding a
missing test.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name usb-usbtest-fix-NULL-pointer-dereference.patch