smdk4412: don't use threaded vsync

The gralloc for smdk4412 waits for vsync. Having
threaded vsync in this case would be problematic
provided our gralloc implementation is different
from that of samsung.

Change-Id: I6c9a84c2bd00a43b47d86647829b9010367dca5d

Conflicts:
	arch/arm/configs/custom_i9300_defconfig
	drivers/video/samsung/s3cfb_main.c
add mali r4p0
n7100 defconfig: switch to mali r4p0
n7100 defconfig: don't use own ramdisk
fix inline kernel building
n7100 defconfig: enable CONFIG_PM_DEVFREQ
fix build with 'CONFIG_PM_DEVFREQ' enabled
romfeatureset: default to aosp
mali400: use pegasus platform code from r3p2
partial picked from this commit: 4fb0e6296b0c60ea0d398b1a15376394dc6db1ce
no need to apply the other changes, they are already included