staging: nvec: insert blank lines after declarations

This patch fixes coding style warnings reported by checkpatch.pl:
"Missing a blank line after declarations".

Signed-off-by: Pawel Lebioda <pawel.lebioda89@gmail.com>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>