Boeffla ramfs: Add deletion of app settings if app is deinstalled via config file
Revert "Preliminary fix for exynos-mem exploit"

This reverts commit 13123af1379fa70de1beaaf348dbc5b7a01ca09d.
exynos-mem: Fix major security hole

- all credits to AndreiLux

- adjusted to work with Samsung Update6 source code by andip71

This fixes the exynos-mem device security hole. The driver allowed any user
to access all of the device's lowmem through the provided mmap functionality.

We create a small little framework collecting the actual CMA memory blocks
that exist on the device; they are the root cause of the existence of this device
driver. We white-list only the CMA memory spaces as parameters to the mmap
function and deny access to any other memory space requests.

We furthermore just allow access to the "s3c-fimc" memory block as this is
seemingly the only space which upon access denial actually breaks functionality.