drm/exynos: s3c6410_g3d: Hack up DMA support using PL080 DMAC

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
ARM: dts: s3c6410: Add DMA resources to G3D node

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
drm/exynos: s3c6410_g3d: Distinguish non-atomic requests

Instead of relying on dirty level incorrectly, requests that require
non-atomic state update now mark context as non-atomic and its state
update will be performed by kfimgd.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>