UPSTREAM: Staging: Fixes string split across lines in zsmalloc zsmalloc-main

(cherry-pick from commit 93ad5ab50476aa7e2b33aac31f41d0efc9f729d7)

Fixes the following checkpatch warning:
WARNING: quoted string split across lines

Bug: 25951511

Change-Id: I89f42719908878ebff8be2b6d0aa10da86d70955
Signed-off-by: Marlies Ruck <marlies.ruck@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>