STAGING: COMEDI: Added spaces around binary operators in plx9080.h

This patch adds spaces around binary operators in plx9080.h.

Signed-off-by: Moritz König <moritz.koenig@fau.de>
Signed-off-by: Fabian Lang <fabian.lang@fau.de>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>