Asynchronous Fsync: initial extraction of Async Fsync from HTC

Signed-off-by: Paul Reioux <reioux@gmail.com>
Signed-off-by: Chester Kener <Cl3Kener@gmail.com>
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	fs/Kconfig

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	fs/Kconfig