Revert "fix zram_for_android compiling"

This reverts commit 6967b1420f1d7b1e83b228cf549329051385ab01.
Revert "zram: last time"

This reverts commit 633981fef18e81bde7c75d1743bb9bc4507f1a85.
Revert "zram: forgot to fix the name of zram_num_devices in zram_drv.h"

This reverts commit 5ccc1376cd1bfe8afa9744c18bfa6affa6d8f191.
Revert "zram_sysfs: num_devices was renamed to zram_num_devices"

This reverts commit 802a692ac657e8b0146aaaf78d59f7b95e04cce7.
Revert "Add ZRAM_FOR_ANDROID, with all of the bits"

This reverts commit 9a731ba5e3425db41b33da1e36644365ff10bc49.
Revert "zram: Simplify zram disk resizing interface"

This reverts commit 4beed5251026ff21536040a880ac44c36cfeb7ab.
Revert "staging: Add Snappy compression support to zram (alt)"

This reverts commit 219cbf2210c3b21fdb624787500cfac07cb937ac.