Staging: iio: standardize kconfig/makefile spacing/style

Standardize the spacing/style across the IIO build files:
	- comment block in Kconfigs
	- newlines at ends of files
	- trailing lines at ends of files
	- indent with one tab, not spaces or mixed

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>