Revert "mem: fix permissions on exynos-mem"

This reverts commit 6f23f7b0ada1a844daa9561b0d1db4684e2de209.
Made REVERTS to arch/arm/common/gic.c and friends to FIX old BUG!

BUG was in arch/arm/mach-exynos/mct.c
to fix this code i have restored small function in gic.c
but i didnt realized that it's belong to very big code that was missing.
so this was BUG. now it's gone.

i have reverted all that needed to have all functions in place for
arch/arm/mach-exynos/mct.c