Asynchronous Fsync: initial extraction of Async Fsync from HTC [faux123]
Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
        drivers/mmc/core/mmc.c

Change-Id: I8db096eb281eccd8983c0cfc2c8df096d9f763f7

Conflicts:
	fs/Kconfig