Revert "fs/dyn_sync_cntrl: dynamic sync control"

This reverts commit 817d909d41070e68d3a614ad7b9c165750cf3135.

Conflicts:
	fs/Kconfig
	fs/dyn_sync_cntrl.c
	fs/sync.c

Probably causing lockups when screen off
sync.c: add a module_param to fsync() calls. fsync is still disabled by default but users will have the choice of having a faster build or a safer build (for data integrity). Props for simms for busting my ass off with this one :)

Conflicts:
	fs/sync.c

Bring back fysnc toggle as dynamic caused problems