Revert "staging: Update snappy compression to latest version"

This reverts commit b520e245372bc620f10a8636a077996fe2828b07.
Revert "Config: Change zRam compression to snappy"

This reverts commit 9a3a590153eaaa05d8eb5c4ec1c906119fec975b.
PATCH: applied linux kernel patch 3.0.99->100