net: rmnet_usb: Fix probe error path

The probe() error path frees the net device before unregistering
it.  This is resulting in a BUG.  Call usbnet_disconnect() in
error path.

CRs-Fixed: 478213
Change-Id: I85b5c72dc50c649846439bc997dda1fcb968a197
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
3 files changed