There are a few remaining drivers/usb/ files that do not have SPDX identifiers in them, all of these are either Kconfig or Makefiles. Add the correct GPL-2.0 identifier to them to make scanning tools happy. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Bug: 143059282 Change-Id: I2914396e10e0ccf51ec67290e833a82c7e90da9a Signed-off-by: Kyle Tso <kyletso@google.com>