UPSTREAM: staging/zsmalloc: Fixed up incorrect formatted comments

(cherry-pick from commit 396b7fd6f9668c04f20ee6daca3054f5c5ec1056)

The existing comments are using an odd style. Fixed them up to adhere
to the StyleGuide. No code changes.

Bug: 25951511

Change-Id: Ica40c276260a4a4fb573185929d804fa3685e1b0
Signed-off-by: Sara Bird <sara.bird.iar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>