Revert "dynamic fsync: favor true case since most will be using this feature"

This reverts commit fa1674b274df0c30383b15c146477987da886cd7.
Revert "dynamic filesync: add some cache optimizations"

This reverts commit 91604fbc4df899ad69337a1d8837e2490c69d1f0.
Revert "fs/dyn_fsync: check dyn fsync control's active prior to performing fsync ops"

This reverts commit 78ef42667aea2a99337c0493e14a5727f1604e00.
Revert "fs/dyn_sync_cntrl: dynamic sync control"

This reverts commit 25725fc9ef1ea360a0990bdc5a711d4ae50591c0.
Revert "switch do_fsync() to fget_light()"

This reverts commit ed0dbf0478a119d9e98ed739f053435d661e4b04.
Make Fsync Configurable