copyright header fixes
usb pid: mark the unused CC3D PID as spare

The USB_PRODUCT_ID_CC3D was reserved for CC3D but didn't get
used because we made it use identical firmware to the CC.
The CC/CC3D differences are adapted to at runtime based on the
board revision:
  #define BOARD_REVISION_CC   1
  #define BOARD_REVISION_CC3D 2
usb win: remove vendor name from strings in .inf file.

The .inf file is really just pointing at the Microsoft CDC
driver so it doesn't make sense to put a different vendor
name in the strings.

This also makes it more friendly for other vendors to be
included in the same file.