[PATCH v5 3/4] zram: make deduplication feature optional

From: Joonsoo Kim Benefit of deduplication is dependent on the workload so it's not preferable to always enable. Therefore, make it optional in Kconfig and device param. Default is 'off'. This option will be beneficial for users who use the zram as blockdev and stores

[PATCH v5 3/4] zram: make deduplication feature optional

From: Joonsoo Kim Benefit of deduplication is dependent on the workload so it's not preferable to always enable. Therefore, make it optional in Kconfig and device param. Default is 'off'. This option will be beneficial for users who use the zram as blockdev and stores build output to it.