usb-gadget: Migrate the repository and make non-board-specific

This migrates the imx-board-gadget stuff into usb-gadget and makes it
non-board-specific.

Change-Id: I8ce91eb6c277704079dc861ec0148b06229af58f
15 files changed
tree: 3583021fbadc9455b615b450576d801d6ca72b3b
  1. debian/
  2. etc/
  3. usr/