Remove faux fsync [SQUASHED]

Revert "fs: sync: add missing return if fsync is disabled from userspace."

This reverts commit 1be7d8a4ff8e5ca3a696ef25aff81512a9018e2b.

Revert "fs: sync: enable fsync by default."

This reverts commit 39e8c0f0a37494c980b2542056c1bc11b5a2ecf6.

Change-Id: I36f8ecbcd4599306dc916685e5ecea1885694dfc

Revert "Added fsync on/off support."

This reverts commit 080cd37665332f787a1bc946b8af1e3408e22bb4.

Change-Id: Ia4f3083efb5bfa441d04f371b800a7c03052a823
fs/dyn_sync_cntrl: dynamic sync control

The dynamic sync control interface uses new power_suspend interface

While screen is on, file sync is disabled
when screen is off, a file sync is called to flush all outstanding writes
and restore file sync operation as normal.

updated for 8974 kernels

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	fs/Kconfig
Asynchronous Fsync: initial extraction of Async Fsync from HTC

Signed-off-by: Paul Reioux <reioux@gmail.com>