staging: comedi: ni_pcidio: make defines uppercase

According to the Linux coding guidelines, defines should be written
in uppercase. This patch converts all define-statements in the
ni_pcidio.c file to uppercase, thus matching the coding style of the
kernel.
Signed-off-by: Alexander Schroth <alexander.schroth@fau.de>
Signed-off-by: Marco Ammon <marco.ammon@fau.de>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>