staging: octeon-usb: cvmx-usbnx-defs.h: delete CVS keyword marker

Delete CVS keyword marker and a comment that the file is autogenerated.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>