Revert "fs/dyn_sync_cntrl: dynamic sync control"

This reverts commit ade373f3212a259dcf1e95dd9ba57968580ed9f8.

Conflicts:
	fs/Kconfig
Ezekeel's fsync control.
Disable fsync
switch do_fsync() to fget_light()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: flar2 <asegaert@gmail.com>

Conflicts:
	fs/sync.c
Makefile adjustment