WhisperYAFFS: fs/yaffs2 tree from https://github.com/garyp/cm-kernel/commits/whisper_yaffs commit 2a10c6d7a7e56dca8d9acf1c1ee0c41365c229f1

I tinkered with subtrees and full revision history, but it kept
turning into a mess when I tried to do things like rebase.

Change-Id: Ic62a2bc74eb1ca240de84a8534f4e2ca2137e023
mahimahi: enable XTS, for WhisperYAFFS

Change-Id: I09cd032d1180da97c03f985fee6a64233985d5ab
mahimahi: some config corrections menuconfig made

Some of the audit changes from earlier aren't supported on this
platform.

Change-Id: If027cb1a5ad0f8d2b9f6ed589dbfe5e14c0cfc44