staging: comedi: comedi_fops: move the module_{init, exit} functions to EOF

For aesthetic reasons, move the module_{init,exit} functions to the end
of the file.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>