merge fixes
update supersu
s3cfb:  Notify userspace of vsync using sysfs

Change-Id: I03e9d38430f93d07b5039d3496566a88f9e914ae

Conflicts:

	drivers/video/samsung/s3cfb_main.c

Conflicts:

	drivers/video/samsung/Kconfig
	drivers/video/samsung/s3cfb_main.c
implement an interface to change home key button keycode
an old temporary trick to get cam working on both samsung and cm roms with CONFIG_ION enabled
u1 audio init trick to get cam recording sound working with CM Roms
Revert "Fix Touchscreen Choppy for MXT224E Touchscreen controller"

This reverts commit 9318f877442993e5ecea63b4b3395c99fa7b3055.
change toolchain
remove custom cpu steps and related modifications