staging: nvec: rename led driver to board specific paz00 driver

The led driver used OEM commands which are not part of the nvec protocol
definition. Therefore it is renamed to nvec_paz00 to reflect that it only
applies to PAZ00 board based devices.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>