Revert "meh2"

This reverts commit e2c2dea7e1aa06f2d1d0fff95db0bafec156d80a.
Revert "fs: implement ASYNC_FSYNC port from htc by faux 123"

This reverts commit 294d1ac224209d4420378347b863771c564ea891.
Revert "dyn_fsync: do not disable do_fsync()"

This reverts commit 9d3e7b159727b7801919ad81871baaa3512cfbc7.