staging: octeon-usb: Fix line ending with a '('

checkpatch.pl message:
"CHECK:OPEN_ENDED_LINE: Lines should not end with a '('"

Signed-off-by: Frank A. Cancio Bello <frank@generalsoftwareinc.com>
Link: https://lore.kernel.org/r/20191028042111.tzfhugs6f4erohir@linux-kernel-dev


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>