Staging: serqt_usb2: fixed blank line style warning in serqt_usb2.c

This is a patch to the serqt_usb2.c file that fixes the following
warning:
WARNING: Missing a blank line after declarations

Signed-off-by: Vincent Heuken <me@vincentheuken.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>