Revert "mmc/core: implement sysfs variable to switch CRC off / on"

This reverts commit da9bc9123f64527dd5d82584530b540b5eb385e7.
Revert "async fsync from htc one (ported by faux123) + version 2.2.3"

This reverts commit 21531ab89d7a60de4a9f65de58f3e03cad8ebbdb.
Asynchronous Fsync: initial extraction of Async Fsync from HTC

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

Conflicts:
	include/linux/fs.h