staging: comedi: ni_mio_common: Code reformat and re-indentation

Resolve general code indentation problems as detected by checkpatch script.
Implement code reformat and re-indentation as per coding style to
improve readability.

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Link: https://lore.kernel.org/r/20200314210749.GA3393@deeUbuntu


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>