Revert "staging: zram: change default selection of LZO compression to LZ4 as we don't use LZO compression anymore"

This reverts commit de7929ba0072ca87d1a30ef9c4ebf9abc13e69c9.
Revert "Revert "zram: backport zram from 3.7 kernel""

This reverts commit 8743572fe765934ef5f28539845d7bda0a60c216.
Revert "Revert "drivers/staging/zram: adapt to 3.0 kernel""

This reverts commit 918f8514ed9e8f5154e443fc0b6bb139f604a4d4.
Revert "Revert "staging: zram: add Crypto API support""

This reverts commit 3820f3e60753008829366ce5a354624827f32b2c.
Revert "Revert "staging: zram: add per-cpu support to Crypto""

This reverts commit 5f9270c7a48b098181301aeaa86deb11a7fe6012.
Revert "Revert "drivers/staging/zram: change compressor from lzo to lz4""

This reverts commit 1caaaa381006729e584a5f289ad42e53604c67d8.
defconfig: disable xvmalloc