staging: comedi: mite: tidy up module init/exit

Move the module_init()/module_exit() so they are in the prefered spot
on the line after the function.

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