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

This reverts commit 1af8234f04e8a31360222986b88d59a6fba1b58f.
Revert "exynos-mem: Fix major security hole Merge 오류 수정"

This reverts commit d2f2cb0e5d28d2423a353bdc03edbe7cbf75775d.
Revert " exynos-mem: Fix major security hole"

This reverts commit bc6dc0df6bd195e14ef6b262356e60788a1531ba.