Revert "s3cfb: Notify userspace of vsync using sysfs, make uevents optional"

This reverts commit f703ed3b6c0c28a513c0a9dab3b8bb2572fca67f.
s3cfb: Notify userspace of vsync using sysfs, make uevents optional

Change-Id: I6fe8de47961d5c0ba73eb45543a675b6fd4344a4
Kernel 1.36B Stable, Very fast!