staging: iio: dummy: replace block comment with single line comment
staging: iio: dummy: replace block comment with single line comment

Replace one block comment with a single line comment. Follow style of
previous comment and omit word channel, since it's clear the topic is
channels.

Addresses checkpatch.pl:
WARNING: Block comments use * on subsequent lines

Signed-off-by: Alison Schofield <799f8b6e0fb7eee6c70f3da80a2d03d9a07fdffb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs