staging: ced1401: usb1401.c: add blank line after declarations

Fix checkpatch warnings "Missing a blank line after declarations" in file
usb1401.c

Signed-off-by: Luca Ellero <luca.ellero@brickedbrain.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>